Semiconductor manufacturers
Analog Devices http://www.analog.com/
Burr-Brown http://www.burr-brown.com/
Dallas Semiconductor http://www.dalsemi.com/
Elantec http://www.elantec.com/
Fujitsu http://www.fujitsu-fme.com/
Harris Semiconductor http://www.harris.com/
Holtek Semiconductor http://www.holtek.com/default.html
Intel http://www.intel.com/
International Rectifier http://www.irf.com/
Linear Technology http://www.linear-tech.com/
Maxim http://www.maxim-ic.com/
Microchip Technology http://www.microchip.com/
National Semiconductor http://www.nsc.com/
Philips http://www.semiconductors.philips.com/
Samsung http://www.samsung.com/
Seiko ECD http://www.seiko-usa-ecd.com/
SGS-Thompson http://eu.st.com/stonline/index.html
Siemens http://www.siemens.de/
Sony http://www.sony.com/
TDK Semiconductor http://www.tsc.tdk.com/
Texas Instruments http://www.ti.com/
Zilog http://www.zilog.com/
Electronic Component Suppliers
Combined Precision Components http://www.cpc.co.uk/
Farnell Electronic Components http://www.farnell.co.uk/
Greenweld http://www.greenweld.co.uk/
Magenta http://www.magenta2000.co.uk/
Maplin Electronics http://www.maplin.co.uk/
Quasar Electronics http://www.quasarelectronics.com/home.html
RS Components http://www.rswww.com/
Magazines
Everyday Practical Electronics http://www.epemag.wimborne.co.uk/
EPE Online http://www.epemag.com/
Clubs and Societies
American Radio Relay league http://www.arrl.org/
British Amateur Electronics Club http://members.tripod.com/baec/
Radio Society of Great Britain http://www.rsgb.org.uk/
Multimedia electronics CD-ROMs
Matrix Multimedia http://www.matrixmultimedia.co.uk/
Miscellaneous
WebEE Electronic Engineering Homepage http://www.web-ee.com/
Semiconductor Data Sheets
ChipDocs http://www.chipdocs
ChipDocs (part number finder) http://www.chipdocs/pndecoder/pndecoder.html
ChipDocs (manufacturers sites) http://www.chipdocs/manufacturers/list.html
Adobe Acrobat PDF Reader
Adobe http://www.adobe.com
Advanced Search Engine
Google Advanced Search http://www.google.com/advanced_search