CZ Spectrum (Basic), TK 90 (Basic), Texas Instruments TI99/4A & Basic & Logo (at school), Commodore 64 (with datasette), PC XT (no HDD) & DOS, PC AT 286 (1MB HDD) & DOS, PC AT 486 DLC & Windows 4.1, PC Pentium & W95, Toshiba Tecra 8000 & W98 / SUSE Linux, Sony Vaio PCG-691l & XP Home, Dell SXPS 1640 & W7, Asus 1015e & Ubuntu 12.04 lts.