I duno if this helps, i duno much about computers except how to tear them down..lol. But here is what they are

Dell: 1 ea. - Poweredge 2600, 1 ea. - Poweredge 1400, 1 ea. - 3000, 1 ea. - 4500, 2 ea. - 350, 1 ea. - 340, 2 ea. - 350, 3 ea. - 150, 5 ea. - 400, 42 ea. - GX240, 94 ea. - GX260, 92 ea. - GX270, 72 ea. - GX280, 2 ea. - GX620

IBM: 119 ea. - 8115KUE, 2 ea. - 9637-WBB, 9 ea. - 9637-W59, 1 ea. - 6075-BTU, 6 ea. - 8189-D5U, 4 ea. - 8189-34U, 4 ea. - 6794-26U, 3 ea. - 8115-KUG, 2 ea. - 9637-W5B, 1 ea. - 6350-37U, 1 ea. - 6075-A96

HP: 14 ea. - VL420, 7 ea. - VL400, 1 ea. - XA5, 9 ea. - VL600, 1 ea. - VL800. Compaq: 3 ea. - D310M, 3 ea. - EVOD300, 1 ea. - DC7100, 2 ea. - D31VM, 2 ea. - D220M, 3 ea. - D5D, 1 ea. - EP550, 4 ea. - D5PM, 1 ea. - DV3P