It has probably been a really long time since you have used AOL’s instant messenger – but if you continue to use AIM, you will no longer be able to as of December 15, 2017. It was announced on Friday that after 20 years of existence, AIM will be shut down.

This may not come as a surprise for some seeing as AOL removed any access to AIM from third-party chat clients a few months ago, which caused some speculation about a complete shutdown.

AIM was one of the first instant messaging services to emerge, and it was a quintessential part of anyone in school during the 1990s and early 2000s.

On Twitter, people began reminiscing about AIM: