Revenue Recognition: We generate revenue from the sale of products such as mass transit fare collection systems, air and ground combat training systems, and products with C4ISR capabilities. We also generate revenue from services we provide such as the operation and maintenance of fare systems for mass transit customers and support specialized military training exercises mainly for international customers. We classify sales as products or services in our Consolidated Statements of Operations based on the attributes of the underlying contracts. We recognize sales and profits under our long-term fixed-price contracts which require a significant amount of development effort in relation to total contract value using the cost-to-cost percentage-of-completion method of accounting. We record sales and profits based on the ratio of contract costs incurred to estimated total contract costs at completion. Contract costs include material, labor and subcontracting costs, as well as an allocation of indirect costs. For contracts with the U.S. federal government, general and administrative costs are included in contract costs; however, for purposes of revenue measurement, general and administrative costs are not considered contract costs for any other customers. Costs are recognized as incurred for contracts accounted for under the cost-to-cost percentage-of-completion method. For certain other long-term, fixed price production contracts not requiring substantial development effort we use the units-of-delivery percentage-of-completion method as the basis to measure progress toward completing the contract and recognizing sales. The units-of delivery measure recognizes revenues as deliveries are made to the customer generally using unit sales values in accordance with the contract terms. Costs of sales are recorded as deliveries are made. We estimate profit as the difference between total estimated revenue and total estimated cost of a contract and recognize that profit over the life of the contract based on deliveries. For long-term fixed price contracts, we only include amounts representing contract change orders, claims or other items in the contract value when they can be reliably estimated and we consider realization probable. Changes in estimates of sales, costs and profits are recognized using the cumulative catch-up method of accounting. This method recognizes in the current period the cumulative effect of the changes on current and prior periods. A significant change in one or more of these estimates could have a material effect on our consolidated financial position or results of operations. We record sales under cost-reimbursement-type contracts as we incur the costs. The Federal Acquisition Regulations provide guidance on the types of costs that we will be reimbursed in establishing the contract price. We consider incentives or penalties and awards applicable to performance on contracts in estimating sales and profits, and record them when there is sufficient information to assess anticipated contract performance. We do not recognize incentive provisions that increase or decrease earnings based solely on a single significant event until the event occurs. We occasionally enter into contracts that include multiple deliverables such as the construction or upgrade of a system and subsequent services to operate and maintain the delivered system. For such contracts, arrangement consideration is allocated at the inception of the arrangement to all deliverables using the relative-selling-price method. Under the relative-selling-price method, the selling price for each deliverable is determined using vendor specific objective evidence (VSOE) of selling price or third-party evidence of selling price if VSOE does not exist. If neither VSOE nor third-party evidence of selling price exists for a deliverable, which is typically the case for our contracts, the guidance requires us to determine the best estimate of the selling price, which is the price at which we would sell the deliverable if it were sold on a standalone basis. In estimating the selling price of the deliverable on a standalone basis, we consider our overall pricing models and objectives, including the factors we contemplate in negotiating our contracts with our customers. The pricing models and objectives that we use are generally based upon a cost-plus margin approach, with the estimated margin based in part on qualitative factors such as perceived customer pricing sensitivity and competitive pressures. Once the contract value is allocated to the separate deliverables under a multiple-element arrangement, revenue recognition guidance relevant to each contractual element is followed. For example, for the long-term construction portion of a contract we generally use the percentage-of completion method and for the services portion we generally recognize the service revenues on a straight-line basis over the contractual service period or based on measurable units of work performed or incentives earned. For certain of our multiple-element arrangements, the contract specifies that we will not be paid upon the delivery of certain units of accounting, but rather we will be paid when subsequent performance obligations are satisfied. Generally, in these cases the allocation of arrangement consideration to the up-front deliverables is limited, in some cases to zero, and revenue is reduced, in some cases to zero for the delivery of up-front units of accounting. In such situations, if the costs associated with the delivered item exceed the amount of allocable arrangement consideration, we defer the direct and incremental costs associated with the delivered item that are in excess of the allocated arrangement consideration as capitalized contract costs. We assess recoverability of these costs by comparing the recorded asset to the deferred revenue in excess of the transaction price allocated to the remaining deliverables in the arrangement. Capitalized contract costs are subsequently recognized in income in a manner that is consistent with the revenue recognition pattern for the arrangement as a whole. If no pattern of revenue recognition can be reasonably predicted for the arrangement, the capitalized costs are amortized on a straight-line basis. Revenue under our service contracts with the U.S. government is recorded under the cost-to cost percentage-of-completion method. Revenue under contracts for services other than those with the U.S. government and those associated with design, development, or production activities is recognized either as services are performed or when a contractually required event has occurred, depending on the contract. For non-U.S. government service contracts that contain measurable units of work performed we recognize sales when the units of work are completed. Certain of our transportation systems service contracts contain service level or system usage incentives, for which we recognize revenues when the incentive award is fixed or determinable. These contract incentives are generally based upon monthly service levels or monthly performance and become fixed or determinable on a monthly basis. Revenue under non-U.S. government service contracts that do not contain measurable units of work performed, which is generally the case for our service contracts, is recognized on a straight-line basis over the contractual service period, unless evidence suggests that the revenue is earned, or obligations fulfilled, in a different manner. Costs incurred under these services contracts are expensed as incurred. We make provisions in the current period to fully recognize any anticipated losses on contracts, other than non-U.S. government service contracts. If we receive cash on a contract prior to revenue recognition, and for contracts that are accounted for on a units-of-delivery method, that is in excess of inventoried costs, we classify it as a customer advance on the balance sheet. In addition, we are subject to audit of incurred costs related to many of our U.S. government contracts. These audits could produce different results than we have estimated for revenue recognized on our cost-based contracts with the U.S. government; however, our experience has been that our costs are acceptable to the government.