So, we have many messengers now like msn, yahoo, gtalk , aim etc Which was the first one you had used? I had used MSN messenger about 5-6 years back I don't use it now, only yahoo!
My first ISP was AOL back in the 90s so I was using AIM and I'm still using it along with pretty much every single other option.
AOL! I'd say AIM... but AIM wasn't invented back in the early days of AOL when AOL had its built in IM system. I later moved on to AIM, MSN, Yahoo, and Skype... which are all a must when doing international business .