AOL instant messenger, known to most as AIM, will be discontinued effective December 15.
"AIM tapped into new digital technologies and ignited a cultural shift," the company said in a statement on its website. "But the way in which we communicate with each other has profoundly changed."
Many took to social media to share their nostalgia using the hashtag #AIMmemories, including old usernames.
AIM expressed its sorrow in discontinuing, but said "We are more excited than ever to continue building the next generation of iconic brands and life-changing products for users around the world."