My first comp was (Sinclair) ZX81 with 1Kb of ram, upgraded with 16K module :) After that it was ZX Spectrum 48K with total of 48 Kb J. Thanks to very specific feature of Spectrum (most of his basic was one byte commands, not byte per letter) I was able to make some very fancy programs like (not so simple) FEM (Finite elements method) calculation... My First PC-like comp was IBM IT (not AT) that has numeric coprocessor :) (wow !)