I've had six too!
1) I was too little back then! It was a desktop case though, I know that. 486 I think, Windows 95
2) Windows 98, Celeron 600MHz, 64MB RAM, 8GB HDD, CD-ROM, Onboard Video
3) Windows 98SE, Duron 900MHz, 256MB RAM (blazing fast back then!), 8GB HDD, CD-RW, XFX MX440
4) Windows XP Home, Celeron D 2.66GHz, 512MB RAM, 80GB HDD, CD-RW/DVD-ROM, Radeon 9250
5) Windows XP Pro, Sempron 1.8GHz, 2GB RAM, 120GB HDD, CD-RW/DVD-ROM, 7600GT
Current) Windows Vista Home Premium, E2160 2.7GHz, 2GB RAM, 120GB HDD, DVD-RW, HD3870
*Only the last two were/are mine. The rest were family computers.*