old computing devices

1. Early calculator - http://www.voidware.com/calcs/fx39.htm quickly switched to the LCD version (due to un-affordability to buy batteries) http://www.voidware.com/calcs/fx82.htm
2. Early computer which processed Fortran 77 code : http://en.wikipedia.org/wiki/IBM_1620 actual input using http://en.wikipedia.org/wiki/Card_punch device.
3. My first geeky computer (Microprocessor Kit) http://en.wikipedia.org/wiki/Microprofessor_I

1. Storage was primarily RAM (Cassette recorder - expensive to own) - input the machine code every time powered up
2. 8 KB ROM (EPROM) that we would erase using UV light and reuse
1. Early desktop computer ran on Zilog's Z80 (64KB RAM) and 8 inch floppy drive with OS being CP/M (MS DOS first version had many resemblance to CP/M)