As an Electrical Engineering Student at SUI in the 1950's I 'cut my teeth' on a Post Versalog Slide Rule for mathematical calculations, and the use of this essential tool continued during the first decade and longer when I became a full-time Project Engineer at Measurement Research Center in February 1959. Other than using the MRC Frieden Mechanical desk-top calculator for routine 4-function calculations (+, -, x, and divide), plus square-root extractions, the slide rule reigned supreme. Then, the HP-35 hand-held electronic calculator arrived at my desk in 1973! This section of the JVM Archival Media disc portrays photos of the HP-35, and an MS Word file describing its use at MRC. File name: 1972_02_$395 HP-35 Electronic Calculator_ORG.doc