My computer goes everywhere I go. Some of its peripherals stay in the office, some stay at the girlfriend’s apartment, some stay in my own.
PowerBook “WallStreet”, with the old-timey Mac ADB and serial and SCSI ports. 14" TFT screen. Vintage 1998 manufacture, but I bought it for a good price in late spring of '99 just before the “Lombard” models came out.
512 MB RAM, 500 MHz G3 PowerLogix daughtercard, 60 GB IBM TravelStar (primary hard drive), 18 GB Toshiba (expansion bay hard drive), 8 GB IBM (expansion bay hard drive).
ix3D Road Rocket PC Card for dual monitor support.
MCE CD-RW / DVD-ROM expansion bay drive.
VST Iomega Zip expansion bay drive.
Girlfriend’s apt: 1995-vintage UMAX 630 SCSI flatbed 3-pass color scanner
Office: Dell 19" Trinitron as primary screen; original Apple Extended keyboard (ADB), the best keyboard ever built
My apt: Sony 15" Trinitron as secondary screen
For odd and geeky reasons, I have accumulated operating systems the way other folks accumulate programs. This computer has and can run:
[natively]
MacOS 8.1
MacOS 8.6
MacOS 9.0.4
MacOS 9.2
MacOS X 10.1.3
[non-natively; requires one of the previous to boot first]
Macintosh System 7.5
System 7.1
System 6.0.8
System 4.1
System 4.0
System 3.0
System 2.0
System 1.1
MSDOS 3.3
MSDOS 5.0
Windows for Workgroups 3.11
Windows 95
Windows 98
Windows NT Server 4.0 Sv Pk 5
Windows 2000 Server
Red Hat Linux
Darwin Unix for Intel
AmigaOS - Kickstart 40.63, Workbench 40.62
I’ve been lazy about following up with Anthracite about buying her copy of OS/2 Warp 
Oh, and I carry it around in a humongous Targus bag with a PC Card for digitizing video, a PC Card modem that lets me connect my laptop to the internet using a cell phone, a crossover ethernet cable, a CAT-5 cable, a PowerPrint serial-to-parallel adapter in case I need to print to a non-Mac-serial printer, a spare battery, stereo audio RCA-jack cables, Mac audio-in to dual RCA audio-in adapter, some blank CD-R media, an ADB mouse (original Apple single-button), headphones, DVD CardBus decoder card for watching DVD movies, and a CD wallet containing disks A through O of my MP3 collection plus utility and installer CDs (including PC MacLan to install AppleTalk on any PC I need to share files with; Timbuktu for Windows, Mac, and MacOS X; bootable CDs with Norton, DiskWarrior, and TechTool Pro).
I’ve been procrastinating on getting CardBus USB and FireWire because I keep hoping someone will put out a single CardBus card with both of them on it, even if I can’t run them at the same time.
This is definitely the best computer I’ve ever owned 