document: Pervasive computing goes to work : interfacing to the enterprise The paperless office is an idea whose time has come , and come , and come again . To see how pervasive computing applications might bring some substance to this dream , the author spoke recently with key managers and technologists at McKesson Corporation -LRB- San Francisco -RRB- , a healthcare supplier , service , and technology company with US$ 50 billion in sales last year , and also at AvantGo -LRB- Hayward , Calif. -RRB- , a provider of mobile infrastructure software and services . For the past several years , McKesson has used mobility middleware developed by AvantGo to deploy major supply chain applications with thousands of pervasive clients and multiple servers that replace existing paper-based tracking systems . According to McKesson 's managers , their system greatly reduced errors and associated costs caused by redelivery or loss of valuable products , giving McKesson a solid return on its investment
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