From the invention of computer programming languages up to the mid-1980s, many if not most computer programmers created, edited and stored their programs line by line on punched cards. The practice was nearly universal with IBM computers in the era.
1970. The Logically Unified Mechanical Performer, LUMP. Notice the safety shield, which protects bystanders from the potentially lethal radiation from the 5 mega volt cathode ray tube as well as possible explosion