Demography?

Hi, I'm Hans Olminkhof, mid 40's, a mechanical engineer living in Sydney Australia. Married, 3 kids. I don't have much to do with computers for a living, building the occasional Lotus Notes database being about it. I was originally exposed to computers as an undergraduate and remember writing my first program on punchcards in Forgo, a students version of Fortran2. It ran on an IBM 1620 or something at the University of Western Australia where we could see in the next room a PDP6 in all it's blue glory. Never got any closer to that though. The next year we were limited to remote teletypes linked to the new computer, a Cyber72 which I never saw. I had no contact with computers again until about 1986 when I finally found something useful to do on them, Finite Element Analysis. (engineer stuff). We bought a 286 for home about 1991 and spent $500 a year later get the 80Mb hard drive in it fixed. Not long afterwards I figured out how easy it was to do all that myself. One day in about 1993, I said to someone in a shop what a museum piece the IBM AT I was looking at was. Somehow the conversation got around to me never having even seen the original IBM PC. Then came a trip to the back room to see racks and racks of them. I walked away with one for $20, got to fiddling with it and a few weeks later owned another dozen or so. They would have been on their way to the tip otherwise. I got very interested in the idea of keeping them alive and in the whole idea of how quickly this technology was progressing and disappearing. Anyway, now I've got a whole heap of old computers, maybe half of them working, lots of old software to go with them, manuals etc. I spend a few hours a weekend looking around for more. The list includes: IBM PC's, XT's, AT's, Portable PC's, Convertibles, Displaywriters Compaq Portable's, Portable Plus's, Portable II's Kaypro II's, and IV's Various Apple II's and early Mac's Atari 400's and an 800 Various Apricots A heap of Sirius's (Victor 9000 in USA) Decmate III's Osborne 1's and Executives DOT's An original PET A CBM3032 and the wreck of an 8032 A Compupro box A Cromenco C10 Various BBC's HP 85's, 71B's and a 110 An MAI 4105 Various Microbees An NEC APC and a number of APC III's NEC 8201, 8401, Tandy Model 100 Olivetti M21 Panasonic 840 Sharp PC 5000, 2 X 7000's, MZ811 Sinclair ZX81 and Spectrum's Epson HX20 Canon A200's probably some I forgot, and some uniquely Australian machines, a "Porchester Executive", a "PortaPak" and a Dick Smith "Mini Scamp" (a 1977 kit) I've also got some PDP11 stuff coming when I organise a truck!