Lotus Notes. Why this garbage of an email system is still perpetrated by IBM explains IBM. It worked back in 1999 but pity you if you're in a company still using it and the CIO still putting upgrade patches to it.
Still using it? We went from Gmail (for business) to Notes because IBM Sales managed to convince the leadership that they could track and file everything better in Notes. Now we have to deal with this shitshow of an app where it takes 10 clicks to open a message because you have to file it under a project first and good luck if you ever need to search for anything.
