Video recording of a session given during the annual AVS (formerly American Vacuum Society) international symposium, held in 1999 in Seattle, Washington. The session was organized by the AVS History Committee and the AVS Vacuum Technology Division (VTD). Speakers (and topics dicussed) include: Donald E. Meyer (measurement and control tools for the semiconductory industry, dessicators, adsorption); Robert K. Waits (evolution of vacuum equipment and technology); Richard L. Bersin (plasma etching and ashing, evolution of equipment); Chuck Yarling (milestones in ion implantation); Donald M. Mattox (ion and plasma sources, etching); and John O'Hanlon (outgassing, water aerosols).