A needle roller bearing comprises a plurality of needle rollers and a retainer. Using on-board computers, GPS and two-way communication hardware, rolling stock continuously communicate position, vital sign data, and other information for recording in a data base and for integration in a comprehensive computerized control system. Additionally, a narrow cart, approximately 24 inches in width, is used to gather the goods comprised of a tubular frame forming two tiers connected by supporting brackes, wherein the frame holds removable totes, and has two caster wheels and two central wheels.