Enlarge / ICQ in Windows 98. (credit: Samuel Axon)

After nearly 28 years in operation, messaging service ICQ will cease operations on June 26, according to its current owners.

You'd be forgiven for not realizing it still existed; the proto-IM service hasn't been in the mainstream since the 2000s. But in the late 1990s and early 2000s, it simultaneously laid the groundwork for direct messaging and social networking as we came to know it in the post-Facebook era.

28 years of history

ICQ was something of an accident, as popular as it became. Created by four Israeli computer geeks, it wasn't even meant to be the original idea.