The first computer I used was an Atari 800 w/ 5.25" floppy and the cartridges for the games, we had it hooked up to our 6 1/2' sony bigscreen in the basment, its still in service to this day

plays donky kong and some space invaders like game my little cousins still love.
The first PC I used was an IBM XT clone w/ a 40meg MFM or ESDI (I can't remember) HDD a monochrome screen, some trident video card and about 1meg of ram (it was upgraded to that later I don't remember what it started with) and a 5.25" + 3.5" floppy combo drive (also a later upgrade) it ran dos 2.8 something and was later upgraded to dos 6.0, thing still works to this day (last tested about a year ago to pull some old finical data), but it's currently in storage.
The first PC I personaly owned was a no name Pentium 90 overclocked to 120

w/ a 2 meg S3 graphics card and a 2 meg Orchid 3d card based on the voodoo 1 chipsest for 3d along w/ 64meg of 60ns EDO memory, and a 1.2gig WD HDD (the HDD still works

) based on Win95A
The first PC I personaly built was a Celeron 333A @ 550 on a Gainward BX motherboard w/ a slocket and a golden orb HSF, (yes Gainward used to make motherboards

) I also had an AWE64 gold and a Diamond Viper 550 TNT 1 card w/ 16megs (only cost $80 for a top of the line TNT graphics card back then Man do I miss those days! ) + a 17" Mag CRT that would go up to 1024x768 @ 85hz, That display lasted around 12 years.