Or in some cases Grandparents, great uncles, great aunts etc born in 1930s or earlier
John von Neumann (Hungarian: Neumann János Lajos, December 28, 1903 – February 8, 1957)
C. A. R. Hoare (born 1934), British computer scientist.
Grace Hopper (Cobol) Grace Brewster Murray Hopper (née Murray; December 9, 1906 – January 1, 1992) computer scientist
Edsger Wybe Dijkstra ( 11 May 1930 – 6 August 2002)
Dennis MacAlistair Ritchie (September 9, 1941 – c. October 12, 2011 computer scientist.C programming language
Niklaus Emil Wirth (born 15 February 1934) computer scientist. Pascal, Modula-2 and Lilith. Cause of Logitech selling mice.
Donald Ervin Knuth born January 10, 1938, computer scientist. He is the author of the multi-volume work The Art of Computer Programming.
David Neil "Dave" Cutler, Sr. (born March 13, 1942) software engineer, a designer, and a developer of several operating systems in the computer industry. These operating systems are Microsoft Windows NT, and Digital Equipment Corporation: RSX-11M, VAXELN, VMS (now OpenVMS).
Gary Arlen Kildall (May 19, 1942 – July 11, 1994) computer scientist and microcomputer entrepreneur who created the CP/M operating system and founded Digital Research, Inc.
Raymond "Ray" Kurzweil ( born February 12, 1948) computer scientist. Practically invented optical character recognition (OCR) and machine to read out loud printed books for Blind.
Konrad Zuse (22 June 1910 – 18 December 1995) was a German civil engineer, inventor and computer pioneer. His greatest achievement was the world's first programmable computer; the functional program-controlled Turing-complete Z3 became operational in May 1941.
CRT and radio are Victorian
Batteries 1800 by Volta
Many of the people that invented what we use are retired or dead.
There are 1000s more people.
Transistors envisaged in 1930s, 1948 was when Germanium was pure enough.
Most of what we have is simply commercialisation, improvement and miniaturising what was known by 1950s, developed by people born 1850s to 1930s.