How to implement a spreadsheet
If you're interested in spreadsheets, don't miss sc, the Standard Unix Spreadsheet™ which nobody has ever heard of (the un-Googleable name doesn't help). It was originally written by James Gosling in the 1980s and is in Debian. It runs in a terminal and uses vi keybindings:<p><a href="http://www.linuxjournal.com/article/10699" rel="nofollow">http://www.linuxjournal.com/article/10699</a>