 The IBM 5100, 50 lbs.and $9000 of personal mobility, was introduced in 1975 and presaged – at least in function if not size or price or units sold – the Personal Computer of the 1980s.IBM's 3660 supermarket checkout station, introduced in 1973, used holographic technology to scan product prices from the now-ubiquitous UPC bar code, which itself was based a 1952 IBM patent that became a grocery industry standard.