This homemade rubber stamp was used at Bell Laboratories in the 1960s to stamp outgoing mail to the Multics community. The saying was a play on the United States Postal Service’s “Pray for peace” postmark campaign during the Vietnam War. Multics was not a huge commercial success, but was a major influence in the development of computer timesharing. First developed at MIT in 1964, Multics was a joint effort of MIT, Bell Laboratories and General Electric. The last Multics installation was shut down October 30, 2000, at the Canadian Department of National Defense in Halifax.