Huh. Conspicuously absent early on:
SAGE (Semi-Automatic Ground Environment, 1950s).
NLS (oNLine System, 1960s) it does mention Engelbart and SRI, but it incorrectly attributes hypertext (probably better to attribute to Ted Nelson and Project Xanadu, also 1960s) and the mouse (which was built by Bill English) to him? To paraphrase Doug in an interview with Robert X. Cringley: "well, NLS had links too, but there was nothing hyper about them."?
Later on, it also has mention of some of the various "nets" yet fails to acknowledge AmiNet (from Commodore Amiga users, which in the nascent days of the early Internet, was the world's largest software repository).
Also glaringly absent: no mention of FTP (File Transfer Protocol)? One of the most venerable protocols on the Internet? It's also one of the few protocols that survived the NCP to TCP/IP transition (1983's January 1st "flag day")! Long before HTTP (1989) or even ZMODEM (1986) or even FidoNet (1984), FTP (1971) was a way to get files moved around.
Oh yeah, also gets the inception date of UNIX incorrect (UNIX started in the 1960s on a PDP-7 in assembly at Bell Labs, but it was re-written/re-implemented in C circa 1972 [see this USENIX presentation in which I was cited since I helped with the restoration of that version:
https://www.usenix.org/conference/usenix-09/restoration-early-unix-artifacts ])
It is fascinating insomuch as it is reflective of sort of how much a lot of that stuff was lore that just kind of sat in the brains of folks as that poster was made before Wikipedia (or what Engelbart would describe more generally as a "DKR" Dynamic Knowledge Repository). A lot of the knowledge about this stuff no one individual knows, but collaboratively we can fill in the details that others may have forgotten or never learned.
Kind of reminds me of some old maps and their odd inaccuracies.