our core strategy is to create organic growth by investing in research and development ( `` r & d `` ) to create solutions and tech-enabled services for the health care industry . we may also supplement organic growth with acquisitions or strategic investments . cerner 's long history of growth has created an important strategic footprint in health care , with cerner holding more than 25 percent market share in the u.s. acute care ehr market and a leading market share in several non-u.s. regions . foundational to our growth going forward is delivering value to this core client base , including executing effectively on our large u.s. federal contracts and cross-selling key solutions and services in areas such as revenue cycle . we are also investing in platform modernization , with a focus on delivering a software as a service platform that we expect to lower total cost of ownership , improve clinician experience and patient outcomes , and enable clients to accelerate adoption of new functionality and better leverage third-party innovations . we also expect to continue driving growth by leveraging our healtheintent platform , which is the foundation for established and new offerings for both provider and non-provider markets . the ehr-agnostic healtheintent platform enables cerner to become a strategic partner with health care stakeholders and help them improve performance under value-based contracting . the platform , along with our careaware platform , also supports offerings in areas such long-term care , home care and hospice , rehabilitation , behavioral health , community care , care team communications , health systems operations , consumer and employer , and data-as-a-service . beyond our strategy for driving revenue growth , we are also focused on earnings growth . after several years of margin compression related to slowing revenue growth , increased mix of low-margin services , and lower software demand due to the end of direct government incentives for ehr adoptions , cerner implemented a new operating structure and introduced other initiatives focused on cost optimization and process improvement in 2019. to assist in these efforts , we engaged an outside consulting firm to conduct a review of our operations and cost structure . we made good progress in 2019 and expect this progress to be reflected in improved profitability in 2020 and beyond . we are focused on ongoing identification of opportunities to operate more efficiently and on achieving the efficiencies without impacting the quality of our solutions and services and commitments to our clients . we are also focused on delivering strong levels of cash flow which we expect to accomplish by continuing to grow earnings and prudently managing capital expenditures . we expect to use future cash flow and debt , as appropriate , to meet our capital allocation objectives , which include investing in our business , potential acquisitions or other strategic investments to drive profitable growth , and returning capital to shareholders through share repurchases and dividends . results overview bookings , which reflects the value of executed contracts for software , hardware , professional services and managed services , was $ 5.99 billion in 2019 , which is a decrease of 11 % compared to $ 6.72 billion in 2018 , with the decrease primarily reflecting a more selective approach to low-margin , long-term contracts that typically represent large booking values . 26 revenues for 2019 increased 6 % to $ 5.69 billion , compared to $ 5.37 billion in 2018 . the increase in revenue reflects ongoing demand from new and existing clients for cerner 's solutions and tech-enabled services driven by their needs to keep up with regulatory requirements , adapt to changing reimbursement models , and deliver safer and more efficient care . net earnings for 2019 decreased 16 % to $ 529 million , compared to $ 630 million in 2018 . diluted earnings per share decreased 13 % to $ 1.65 in 2019 , compared to $ 1.89 in 2018 . the overall decrease in net earnings and diluted earnings per share was primarily a result of increased operating expenses , including expenses incurred in connection with our operational improvement initiatives discussed below , partially offset by increased revenues . we had cash collections of receivables of $ 5.79 billion in 2019 , compared to $ 5.49 billion in 2018 . days sales outstanding was 72 days for the 2019 fourth quarter , compared to 74 days for the 2019 third quarter and 79 days for the 2018 fourth quarter . operating cash flows for 2019 were $ 1.31 billion , compared to $ 1.45 billion in 2018 . operational improvement initiatives we transitioned to a new operating structure in the first quarter of 2019. the company has been focused on leveraging the impact of this reorganization and identifying additional efficiencies . currently , we are focused on reducing operating expenses and generating other efficiencies that are expected to provide longer-term operating margin expansion . we are also considering exiting certain low-margin businesses and being more selective as we consider new business opportunities . to assist in these efforts , we have engaged an outside consulting firm to conduct a review of our operations and cost structure . we are focused on ongoing identification of opportunities to operate more efficiently and on achieving the efficiencies without impacting the quality of our solutions and services and commitments to our clients . in the near term , we expect to incur expenses in connection with these efforts . such expenses may include , but are not limited to , consultant and other professional services fees , employee separation costs , contract termination costs , and other such related expenses . story_separator_special_tag we define free cash flow as cash flows from operating activities reduced by capital purchases and capitalized software development costs . the table above sets forth a reconciliation of free cash flow to cash flows from operating activities , which we believe is the gaap financial measure most directly comparable to free cash flow . the presentation of free cash flow is not meant to be considered in isolation , nor as a substitute for , or superior to , gaap results , and investors should be aware that non-gaap measures have inherent limitations and should be read only in conjunction with our consolidated financial statements prepared in accordance with gaap . free cash flow may also be different from similar non-gaap financial measures used by other companies and may not be comparable to similarly titled captions of other companies due to potential inconsistencies in the method of calculation . we believe free cash flow is important to enable investors to better understand and evaluate our ongoing operating results and allows for greater transparency in the review and understanding of our overall financial , operational and economic performance , because free cash flow takes into account certain capital expenditures necessary to operate our business . 34 contractual obligations , commitments and off balance sheet arrangements the following table represents a summary of our contractual obligations and commercial commitments at the end of 2019 , except short-term purchase order commitments arising in the ordinary course of business . replace_table_token_11_th ( a ) at the end of 2019 , liabilities for unrecognized tax benefits were $ 19 million . off-balance sheet arrangements refer to note ( 10 ) of the notes to consolidated financial statements for information regarding our interest rate swap agreement , which is accounted for as a cash flow hedge in accordance with asc topic 815 , derivatives and hedging . libor is scheduled to be phased out by the end of 2021. when libor ceases to exist , we will need to agree upon a replacement index with the lenders under our credit agreement at the time , and such new rates may not be as favorable to us as those in effect prior to any libor phase-out . if the swap and the credit agreement replacement rates are not identical , our hedge could be less effective . recent accounting pronouncements refer to note ( 1 ) of the notes to consolidated financial statements for information regarding recently issued accounting pronouncements . critical accounting policies we believe that there are several accounting policies that are critical to understanding our historical and future performance , as these policies affect the reported amount of revenue and other significant areas involving our judgments and estimates . these significant accounting policies relate to revenue recognition , software development , and income taxes . these accounting policies and our procedures related to these accounting policies are described in detail below and under specific areas within this md & a . in addition , note ( 1 ) , note ( 2 ) , and note ( 14 ) of the notes to consolidated financial statements expands upon discussion of our accounting policies for these areas . revenue recognition in the first quarter of 2018 , we adopted accounting standards update ( `` asu `` ) 2014-09 , revenue from contracts with customers ( topic 606 ) . asu 2014-09 , as amended , replaced most existing revenue recognition guidance in u.s. gaap . this guidance requires a significant amount of judgments and estimates in implementing its five-step process to be followed in determining the amount and timing of revenue recognition and related disclosures . refer to note ( 2 ) of the notes to consolidated financial statements for further discussion regarding significant judgments involved in our application of asu 2014-09. software development costs costs incurred internally in creating computer software solutions and enhancements to those solutions are expensed until completion of a detailed program design , which is when we determine that technological feasibility has been established . thereafter , all software development costs are capitalized until such time as the software solutions and enhancements are available for general release , and the capitalized costs subsequently are reported at the lower of amortized cost or net realizable value . 35 net realizable value is computed as the estimated gross future revenues from each software solution less the amount of estimated future costs of completing and disposing of that product . because the development of projected net future revenues related to our software solutions used in our net realizable value computation is based on estimates , a significant reduction in our future revenues could impact the recovery of our capitalized software development costs . if we missed our estimates of net future revenues by 10 % , the amount of our capitalized software development costs would not be impaired . capitalized costs are amortized based on current and expected net future revenue for each software solution with minimum annual amortization equal to the straight-line amortization over the estimated economic life of the software solution . we are amortizing capitalized costs over five years . the five-year period over which capitalized software development costs are amortized is an estimate based upon our forecast of a reasonable useful life for the capitalized costs . historically , use of our software programs by our clients has exceeded five years and is capable of being used a decade or more . we expect that major software information systems companies , large information technology consulting service providers and systems integrators and others specializing in the health care industry may offer competitive products or services . the pace of change in the hcit market is rapid and there are frequent new product introductions , product enhancements and evolving industry standards and requirements . as a result , the capitalized software solutions may become less valuable or obsolete and could be subject to impairment . income taxes we make a

liquidity and capital resources our liquidity is influenced by many factors , including the amount and timing of our revenues , our cash collections from our clients and the amount we invest in software development , acquisitions , capital expenditures , and our share repurchase and dividend programs . our principal sources of liquidity are our cash , cash equivalents , which primarily consist of money market funds and time deposits with original maturities of less than 90 days , short-term investments , and borrowings under our credit agreement . at the end of 2019 , we had cash and cash equivalents of $ 442 million and short-term investments of $ 100 million , as compared to cash and cash equivalents of $ 374 million and short-term investments of $ 401 million at the end of 2018 . we have entered into a credit agreement with a syndicate of lenders that provides for an unsecured $ 1.00 billion revolving credit loan facility , along with a letter of credit facility up to $ 100 million ( which is a sub-facility of the $ 1.00 billion revolving credit loan facility ) . we have the ability to increase the maximum capacity to $ 1.20 billion at any time during the credit agreement 's term , subject to lender participation and the satisfaction of specified conditions.


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```liquidity and capital resources our liquidity is influenced by many factors , including the amount and timing of our revenues , our cash collections from our clients and the amount we invest in software development , acquisitions , capital expenditures , and our share repurchase and dividend programs . our principal sources of liquidity are our cash , cash equivalents , which primarily consist of money market funds and time deposits with original maturities of less than 90 days , short-term investments , and borrowings under our credit agreement . at the end of 2019 , we had cash and cash equivalents of $ 442 million and short-term investments of $ 100 million , as compared to cash and cash equivalents of $ 374 million and short-term investments of $ 401 million at the end of 2018 . we have entered into a credit agreement with a syndicate of lenders that provides for an unsecured $ 1.00 billion revolving credit loan facility , along with a letter of credit facility up to $ 100 million ( which is a sub-facility of the $ 1.00 billion revolving credit loan facility ) . we have the ability to increase the maximum capacity to $ 1.20 billion at any time during the credit agreement 's term , subject to lender participation and the satisfaction of specified conditions.
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 Suspicious Activity Report : our core strategy is to create organic growth by investing in research and development ( `` r & d `` ) to create solutions and tech-enabled services for the health care industry . we may also supplement organic growth with acquisitions or strategic investments . cerner 's long history of growth has created an important strategic footprint in health care , with cerner holding more than 25 percent market share in the u.s. acute care ehr market and a leading market share in several non-u.s. regions . foundational to our growth going forward is delivering value to this core client base , including executing effectively on our large u.s. federal contracts and cross-selling key solutions and services in areas such as revenue cycle . we are also investing in platform modernization , with a focus on delivering a software as a service platform that we expect to lower total cost of ownership , improve clinician experience and patient outcomes , and enable clients to accelerate adoption of new functionality and better leverage third-party innovations . we also expect to continue driving growth by leveraging our healtheintent platform , which is the foundation for established and new offerings for both provider and non-provider markets . the ehr-agnostic healtheintent platform enables cerner to become a strategic partner with health care stakeholders and help them improve performance under value-based contracting . the platform , along with our careaware platform , also supports offerings in areas such long-term care , home care and hospice , rehabilitation , behavioral health , community care , care team communications , health systems operations , consumer and employer , and data-as-a-service . beyond our strategy for driving revenue growth , we are also focused on earnings growth . after several years of margin compression related to slowing revenue growth , increased mix of low-margin services , and lower software demand due to the end of direct government incentives for ehr adoptions , cerner implemented a new operating structure and introduced other initiatives focused on cost optimization and process improvement in 2019. to assist in these efforts , we engaged an outside consulting firm to conduct a review of our operations and cost structure . we made good progress in 2019 and expect this progress to be reflected in improved profitability in 2020 and beyond . we are focused on ongoing identification of opportunities to operate more efficiently and on achieving the efficiencies without impacting the quality of our solutions and services and commitments to our clients . we are also focused on delivering strong levels of cash flow which we expect to accomplish by continuing to grow earnings and prudently managing capital expenditures . we expect to use future cash flow and debt , as appropriate , to meet our capital allocation objectives , which include investing in our business , potential acquisitions or other strategic investments to drive profitable growth , and returning capital to shareholders through share repurchases and dividends . results overview bookings , which reflects the value of executed contracts for software , hardware , professional services and managed services , was $ 5.99 billion in 2019 , which is a decrease of 11 % compared to $ 6.72 billion in 2018 , with the decrease primarily reflecting a more selective approach to low-margin , long-term contracts that typically represent large booking values . 26 revenues for 2019 increased 6 % to $ 5.69 billion , compared to $ 5.37 billion in 2018 . the increase in revenue reflects ongoing demand from new and existing clients for cerner 's solutions and tech-enabled services driven by their needs to keep up with regulatory requirements , adapt to changing reimbursement models , and deliver safer and more efficient care . net earnings for 2019 decreased 16 % to $ 529 million , compared to $ 630 million in 2018 . diluted earnings per share decreased 13 % to $ 1.65 in 2019 , compared to $ 1.89 in 2018 . the overall decrease in net earnings and diluted earnings per share was primarily a result of increased operating expenses , including expenses incurred in connection with our operational improvement initiatives discussed below , partially offset by increased revenues . we had cash collections of receivables of $ 5.79 billion in 2019 , compared to $ 5.49 billion in 2018 . days sales outstanding was 72 days for the 2019 fourth quarter , compared to 74 days for the 2019 third quarter and 79 days for the 2018 fourth quarter . operating cash flows for 2019 were $ 1.31 billion , compared to $ 1.45 billion in 2018 . operational improvement initiatives we transitioned to a new operating structure in the first quarter of 2019. the company has been focused on leveraging the impact of this reorganization and identifying additional efficiencies . currently , we are focused on reducing operating expenses and generating other efficiencies that are expected to provide longer-term operating margin expansion . we are also considering exiting certain low-margin businesses and being more selective as we consider new business opportunities . to assist in these efforts , we have engaged an outside consulting firm to conduct a review of our operations and cost structure . we are focused on ongoing identification of opportunities to operate more efficiently and on achieving the efficiencies without impacting the quality of our solutions and services and commitments to our clients . in the near term , we expect to incur expenses in connection with these efforts . such expenses may include , but are not limited to , consultant and other professional services fees , employee separation costs , contract termination costs , and other such related expenses . story_separator_special_tag we define free cash flow as cash flows from operating activities reduced by capital purchases and capitalized software development costs . the table above sets forth a reconciliation of free cash flow to cash flows from operating activities , which we believe is the gaap financial measure most directly comparable to free cash flow . the presentation of free cash flow is not meant to be considered in isolation , nor as a substitute for , or superior to , gaap results , and investors should be aware that non-gaap measures have inherent limitations and should be read only in conjunction with our consolidated financial statements prepared in accordance with gaap . free cash flow may also be different from similar non-gaap financial measures used by other companies and may not be comparable to similarly titled captions of other companies due to potential inconsistencies in the method of calculation . we believe free cash flow is important to enable investors to better understand and evaluate our ongoing operating results and allows for greater transparency in the review and understanding of our overall financial , operational and economic performance , because free cash flow takes into account certain capital expenditures necessary to operate our business . 34 contractual obligations , commitments and off balance sheet arrangements the following table represents a summary of our contractual obligations and commercial commitments at the end of 2019 , except short-term purchase order commitments arising in the ordinary course of business . replace_table_token_11_th ( a ) at the end of 2019 , liabilities for unrecognized tax benefits were $ 19 million . off-balance sheet arrangements refer to note ( 10 ) of the notes to consolidated financial statements for information regarding our interest rate swap agreement , which is accounted for as a cash flow hedge in accordance with asc topic 815 , derivatives and hedging . libor is scheduled to be phased out by the end of 2021. when libor ceases to exist , we will need to agree upon a replacement index with the lenders under our credit agreement at the time , and such new rates may not be as favorable to us as those in effect prior to any libor phase-out . if the swap and the credit agreement replacement rates are not identical , our hedge could be less effective . recent accounting pronouncements refer to note ( 1 ) of the notes to consolidated financial statements for information regarding recently issued accounting pronouncements . critical accounting policies we believe that there are several accounting policies that are critical to understanding our historical and future performance , as these policies affect the reported amount of revenue and other significant areas involving our judgments and estimates . these significant accounting policies relate to revenue recognition , software development , and income taxes . these accounting policies and our procedures related to these accounting policies are described in detail below and under specific areas within this md & a . in addition , note ( 1 ) , note ( 2 ) , and note ( 14 ) of the notes to consolidated financial statements expands upon discussion of our accounting policies for these areas . revenue recognition in the first quarter of 2018 , we adopted accounting standards update ( `` asu `` ) 2014-09 , revenue from contracts with customers ( topic 606 ) . asu 2014-09 , as amended , replaced most existing revenue recognition guidance in u.s. gaap . this guidance requires a significant amount of judgments and estimates in implementing its five-step process to be followed in determining the amount and timing of revenue recognition and related disclosures . refer to note ( 2 ) of the notes to consolidated financial statements for further discussion regarding significant judgments involved in our application of asu 2014-09. software development costs costs incurred internally in creating computer software solutions and enhancements to those solutions are expensed until completion of a detailed program design , which is when we determine that technological feasibility has been established . thereafter , all software development costs are capitalized until such time as the software solutions and enhancements are available for general release , and the capitalized costs subsequently are reported at the lower of amortized cost or net realizable value . 35 net realizable value is computed as the estimated gross future revenues from each software solution less the amount of estimated future costs of completing and disposing of that product . because the development of projected net future revenues related to our software solutions used in our net realizable value computation is based on estimates , a significant reduction in our future revenues could impact the recovery of our capitalized software development costs . if we missed our estimates of net future revenues by 10 % , the amount of our capitalized software development costs would not be impaired . capitalized costs are amortized based on current and expected net future revenue for each software solution with minimum annual amortization equal to the straight-line amortization over the estimated economic life of the software solution . we are amortizing capitalized costs over five years . the five-year period over which capitalized software development costs are amortized is an estimate based upon our forecast of a reasonable useful life for the capitalized costs . historically , use of our software programs by our clients has exceeded five years and is capable of being used a decade or more . we expect that major software information systems companies , large information technology consulting service providers and systems integrators and others specializing in the health care industry may offer competitive products or services . the pace of change in the hcit market is rapid and there are frequent new product introductions , product enhancements and evolving industry standards and requirements . as a result , the capitalized software solutions may become less valuable or obsolete and could be subject to impairment . income taxes we make a

