They have LEDs. I soldered them in myself when I put together my Altair kit :-) BTW -- a lot of the popular history of the Altair is wrong. I have seen several "official" source list the original price at $375. It was MUCH more expensive. I have my original invoices somewhere ... -Rob -----Original Message----- From: John Honniball [SMTP:John.Honniball@uwe.ac.uk] Sent: Wednesday, May 30, 2001 11:06 AM To: classiccmp(a)classiccmp.org Subject: Altair 8800 front panel lamps I've just been reading "Computer: A History of the Information Machine", by Martin Campbell-Kelly and WIlliam Aspray. It mentions the Altair 8800 (on page 240) and describes the front panel: When loaded, the program would run; but the only evidence of its execution was the change in the shifting pattern of the neon bulbs on the front. Neon bulbs? Did the Altair really have neon bulbs on the front panel? I would have expected LEDs -- can anyone clarify this, please? -- John Honniball Email: John.Honniball(a)uwe.ac.uk University of the West of England