The following people have Web pages referring to the UK101:

• The Alchymist.
• Stephen Crane, who's written a 6502 emulator.
• Paul Evans.
• Bob Green.
• Steve Harvey.
• Paul Ledbury.
• Leif W Linde
• Conor O'Neill.
• Grant Searle, who has a UK101 in his web-museum, as well as circuits for building a UK101-compatible machine.
• Rick Sterry.
• Stephen Taylforth.
• Drew Wagar.
• David Ward

In addition, take a look at Ian McLaughlin's UK101 Page, which includes an HTML version of the manual and another emulator. Ian has also set up a UK101 mailing list.

The Southdown Amateur Radio Society was an early user of the UK101 for ham radio.

Another Web-museum with a UK101 is Steve Smith's Old Computer Archive. (UK101 exhibit)

The 6502 processor was designed in about 1975 by MOS Technology, Inc. of Norristown, PA. Commodore bought the company in 1977. The designer of the 6502, Chuck Peddle, went on to design the Commodore PET and the Sirius. The chip was second-sourced by Synertek and Rockwell (Synertek made the mask-programmed ROMs for the UK101 too). Some of the employees of MOS Technology left the company and formed the Western Design Center where they continued to develop the 6502 architecture.

This Chronology of Personal Computers mentions the 6502 first shipping in 1976.

Nowadays, you'll find enthusiastic support for the 6502 at 6502.org, where there is a full set of data sheets as well as a software library. There's also The 6502 Group who meet in Denver every Tuesday. The chip collections at CPU World show what the packaged 6502 chip looks like, as well as showing all the second-source manufacturers. As for a photo of the chip itself, have a look at the Molecular Expressions web page.

Oxford University Computing Laboratory's 6502 Microprocesor Instruction Set Summary (one of a set).

The same processor appeared in many other 8-bit micros:

Development System	KIM-1 (the original 6502 development system)
Development System	Synertek SYM-1
Development System	Rockwell AIM-65
Development System	Acorn System One
Hobbyist System	Ohio Scientific Superboard II
Hobbyist System	Tangerine Microtan 65
Game Console	Nintendo Entertainment System
Game Console	Atari 2600, 5600 and 7800
Business System	Apple ][ and Apple ///
Business System	Commodore PET
Home System	Commodore 64, Plus-4, VIC-20
Home System	BBC Micro and Acorn Electron
Home System	Acorn Atom
Home System	Oric I and Oric Atmos
Home System	Atari 400 and 800

If you're interested in other machines of the time, take a look at The Home Computer Hall of Fame.