ThinkCentre M58

The case is around the size of a biscuit tin, so it takes up very little space. Getting inside the M58 is easy: simply press a button and swing the top of the chassis up to reveal the interior. You can fit an additional 2GB of RAM for a maximum of 4GB. You'll have to use compact laptop memory, but the replaceable DVD writer and hard disk are standard desktop components. Due to the limited space, there's no room for additional internal storage devices. The 320GB hard disk looks meagre compared with the 500GB disks that dominate this Labs, but it's more than enough for office files. There are no PCI Express slots at all, though.