1977: machine language (on punch cards), a little COBOL
1980s: assembly, C, dBase, and BASIC (and some PLCs)
1990’s: some COBOL, FORTRAN, and Pascal, and HTML+CGI, but mostly C++, VisualBasic, and Bash
2000s: mostly HTML, Javascript, and ASP
2010s: mostly C++ on Arduino, Java, and PowerShell (some Python, Ruby)
2020s: TI and Nordic SoCs