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On 19, July, 1982, the system had nineteen crashes of batch jobs; that was my first day of full-time employment.
By December, crashes disappeared.
During the next year, we continued to stabilize and enhance the system.  For the inventory system, we added a field to hold the remainder from average cost calculations.  People joked that it would only be pennies, but with $400 million in purchases, the amount was at least a thousand dollars per week day.  We also started a customer tracking program, which kept records of what individual customers bought.  Those customers with significant patterns were invited to hours sales parties, which generated millions of dollars per year and significant gross profit.

conveyor belt control
radio controlled barcode readers
repair and service tracking
Voice over Network telephones; saved $600,000 per month
fraud detection
cycle counting
store software updating by Craig Bremner and David Doyle
bin lookup by sku
PCC 1982 - 2014