Artifact Details Title Heathkit Microcomputer Learning System ET-3400 Catalog Number 102695935 Type Physical object Date 1977 Manufacturer Heath Identifying Numbers Model number ET-3400 Serial number 02816 Dimensions overall: 3 1/2 in x 12 in x 11 1/2 in Category Digital computer/development system Credit Gift of Martin Van Derpool Lot Number X4675.2008