Programing for years, Started out with Z80 (mostly CPM stuff), NSC800, (Embedded Systems Work/Cash Reg systems) original versions of IBM 360 (Banking Systems), PerkinElmer 3320 (ATM System Control) TI 9900 (Embedded Systems Work/ Embossing and image processing).... Windows, Tandem, DEC.... Bunch of other stuff now moving into Cell Phone and Tablet type apps. Actually not just programing, add in System Design, QA, Ergonomics, Disaster Recovery.... lots more here also