Five early participants of the Homebrew Computer Club spoke at a celebration of the 30th anniversary of the group. From left to right are Michael Holley, Steve Wozniak, Allen Baum, Lee Felsenstein and Bob Lash.

Bruce Damer, curator of the DigiBarn Computer Museum in Santa Cruz, Calif., participates in the festivities marking the anniversary.

Lee Felsenstein, designer of the Osborne 1, moderated the Homebrew Computer Club in its early years.

Lee Felsenstein (left) listens to Bob Lash, another early member of the club.

Apple Computer co-founder Wozniak cuts a cake to help celebrate the club’s 30th birthday.

Collaborators in the early days of the personal-computer revolution, Baum and Wozniak shared their memories.

John Draper, also known as Cap’n Crunch, was on hand at the anniversary party. In the 1970s, Draper was convicted of wire fraud for using a “blue box” and a toy Cap’n Crunch whistle from a cereal box to tap into the national telephone network. He also developed the first word processor for the Apple II.

Wozniak signs a silicon wafer for an attendee of the Vintage Computer Fair, which hosted the Mountain View, Calif., celebration.

Sellam Ismail, founder of the Vintage Computer Festival, talks about his own collection of 2,000 vintage computers, housed in a warehouse in Livermore, Calif. The most he paid for a single item was $400–for a prototype Apple IIGS. His rarest machine is an Apple Lisa with the original, and buggy, dual Twiggy drives.