[avocollector]

I'm keeping them ALL - every Philips, Motorola, valve, transistor and integrated data book, all the theoretical stuff AND PE, PW and Aussie radio and hobbies books back to the 40's. To this end I have a 3 x 3m storage shed filled with plastic boxes and all indexed. So in theory you can look up any item on the computer and then go get it from the labelled box - in theory of course (sometimes fact and theory are at odds!). My wife supports this and has her books in the hallway on 3 large bookcases - but then she's a University trained electrical engineer - high power stuff.