The IEEE, of which yours truly is a Senior Member, is celebrating 125 years of success.
In the networking space, the development of the IEEE802.3 Ethernet standard in 1983 has certainly been a key milestone for this worldwide professional organization.
Starting at a lowly 1.25Mbit/s, Ethernet has evolved to 10 Gbit/s in its wired mode and over 100Mbit/s in its wireless incarnation.
I would highlight three attributes of Ethernet:
1) It is a truly global INTEROPERABLE standard.