Christopher Alexander was a visionary architect and philosopher. This Web page summarises one of his better known books. Much used by computer scientists.

Current mapping and arithmetic lead to predictions of colder climate

PhotoShop or similar image editor provides a way of measuring a scanned image accurately, but you need Pythagoras…

Multitasking doesn’t work very well

Some projects in Southern Africa aim to reduce the impact of the digital divide

David Edgar re-translates and prunes the German theatre classic: Music and a stark stage, more space for the theologians

Minimal instant on keyboard usable on trains and allows capture of text in meetings and in odd corners of time.

50 questions at level 1 and 2 on Number

Tinderbox – soon for Windows – is worth the money, deep software

Use a spreadsheet to write each idea in a cell with a heading….

This tomb shows a very scary painted figure and an old style horroscope. The place must have looked totally different when the walls were polychrome murals and lit entirely by candles….