COBOL
Business-oriented language from 1959 — still processing the majority of the world's financial transactions.
static
compiled
since 1959
imperativeprocedural
COBOL was designed to be readable by non-programmers and to process business records at scale. Roughly 95% of ATM transactions and the majority of banking core systems worldwide still run on COBOL. Billions of lines of COBOL code run on IBM mainframes, and skilled COBOL developers remain in high demand.