And why I'd pick it; Just a few years after the closed-book became popular, it was a true desktop replacement. Most laptops, Mac or others, had a screen, keyboard, pointing device, serial port. Maybe networking. Maybe serial and video.
The 540c though: Stereo speakers, active matrix, 256 or thousands of colours, microphone, trackpad, floppy, dual batteries, or pc card in one bay, ethernet, serial, modem, adb, external video mirroring and spanning, scsi, in/out audio jacks...contd