for my personal use. I constantly lose the pieces of paper on which I note links having been given by friends or those I had seen on a screen. Now I know where I can find the links — and if somebody finds what he/she was looking for thanks to these lists, so much the better. The lists are not maintained, i.e. blind links will be deleted when I stumble over them in search for something and I note that they are dead, then I will delete them. Therefore, dead links may hang around for quite a while.
Topic Astronomy: Spacecraft, Information, Solasrsystem, Deep Space, Data Bases, Maps, Tools, …
About books and authors.
Links to the sites of some companies with which I have some business or have a deeper interest in on various reasons.
Anything that seems to fit nowhere.
Links to companies and brands from which I purchased hardware, mostly computer related.
Links to some online maps, other maps and digital elevation maps (DEM). Not restricted to Earth.
Multimedia Sites: Sound and Image. An appropriate decoder might be needed. Radio, TV, Sound, Image, Movie, Animation, Anaglyphs.
Photography, Panorama, High Dynamic Range Image.
Raytracing and 3D.
Diverse scripts for programming: PHP, REBOL, CGI, PERL, Python, JavaScript, usw.
Web presence of societies I am a member of or have a special interest in.
Software for download. Freeware, Shareware, commercial.
Telecommunication, Network, Internet: Information about connectors, protocols, etc. File formats.
My own web presences and sites, I fully or partly operate and maintain.