You can see the main A4000 unit mid-left with its keyboard in front of it. Above is the power button controller and the A-B monitor switch. The monitor switch is used to show the AGA signal of either the A4000 or my A1200T on the CTX AD-1970 multisync monitor. The silver box under the A-B switch is an extra AT power supply. I use it to keep the power load off of the main A4000 power supply. It runs the CD-ROM drive, tape drive and 18 Gig IBM hard drive. Under the AT power supply is the NEC 16x SCSI-II CD-ROM drive and the Technics SA-160 receiver/stereo amplifier. Finally, in front of that you can see half of the Crystal Trackball.