Patent US 6750881 B1 "User definable on-line co-user lists" was born, a.k.a, the buddy list. You didn't have to check whether somebody was on, but it told you," Appelman said.
Far from a giant development product, Appelman discussed it with only his close colleagues, as AOL did not have a great amount of oversight at the time. Two months later, AOL would switch from an hourly rate to a flat fee.
Appelman joined after his time at IBM, where he worked on some of the first standards to connect computers over the Internet (through what are known as Transmission Control Protocol/Internet Protocol or TCP/IP).
Before building a messaging program for the Internet, he created something else that would eventually spawn AIM.
It handled around 180,000 simultaneous connections. Bosco said the goals for AOL's messenger were set much higher: 5 million simultaneous users.Millions of subscribers paid AOL monthly for the ability to sign online. The "You've got mail" notification became the sound Americans associated with their first email accounts, as well as a movie with Tom Hanks and Meg Ryan.Barry Appelman, Eric Bosco and Jerry Harris worked at AOL in the 1990s and early 2000s as engineers on AOL Instant Messenger, known commonly as AIM. Appelman and Bosco programmed in the Unix operating system.At first, AOL users who logged on were not greeted with a list of fellow friends online.But AOL did have a manual way to search for said friends, if you knew their exact screennames.