In 1970 I started work for a high tech security firm. One system we developed provided security for the tunnels in Washington DC and other government buildings. Monitoring was a large display board with a map of the area with LED indicators powered by an HP 2100 series computer (http://en.wikipedia.org/wiki/HP_2100) with 8KB of memory. On my own at night I created my own program to predict which was the stock market was going (up or down) prior to each trading day, it was 85% accurate. Also purchased the first hand held calculator, an HP-35, highly accurate as the square root of 4 = 1.99
Independently I collaborated with Mobile Research on computerized fuel injection systems for race cars.
In the mid 1970’s I work for an small automotive research company designing and testing a digital fuel injection system using a 16Bit National semiconductor “scamp” microprocessor (http://en.wikipedia.org/wiki/National_Semiconductor_SC/MP). The object was to adapt to any combustible liquid that you could dump into the fuel tank. This included Methanol, Whiskey, Perfume and 1st distillate from crude oil. Co-author of a Society of Automotive Engineers paper (No. 780039) published in 1978 “Closed Loop Control for Adaptive Lean Limit Operation”. In 1976 I built my first personal computer (Digital Group - http://www.bytecollector.com/the_digital_group.htm), purchased the parts from a store named “Personal Computing”. Magnetic tape drive and 5 ¼ floppy drives. Never purchased that Apple Lisa I was looking at.
The late 1970’s: Started working for RCA in New Jersey as a QC Technician, I was the middle man between the government DPRO office and RCA’s in house quality inspectors. During this period in time we had several remote terminals used for data entry. While logging on I accidently pressed the wrong key sequence of keys and ended up connecting to RCA’s Radio City studios located at Hollywood and Vine. I reported the breach and demonstrated it to my supervisor and they just said forget it and never to any action to correct it. So much for the 1st hack, if I could get in then it’s reasonable to assume other employees could also.