1. 1972 - IBM 1620 machine language (NOT assembler! Decimal numbers punched on punch cards. Yes, it was a DECIMAL machine...) in high school
2. Fortran II, high school
3. Mix assembly, college (Knuth virtual machine)
4. PL/1, college (yes, they still taught assembler before higher-level languages, and I am forever grateful)
5. Nova assembly (college engineering lab)
6. IBM 360 assembly (first part-time job in college, working on MTS operating system)
7. Snobol (about my favorite ever, I guess why I like Ruby...)
8. Intel 4040 assembly (first real job)
9. 6502 assembly (We switched processors. Visited the factory, met Chuck Peddle, father of the PET. Apple I did not yet exist).
10. 8080 assembly
11. C
Probably have written more C++ code than anything else, currently mostly Ruby.
I think I get some prize for most languages not present in the survey choices.
