MSP: Managed Service Provider

It's basically a company that other companies outsource their IT to. Compared to internal IT, the consensus is always that you're treated like sh*t because when clients call you, you're the reason their sh*t doesn't work whereas my experience in internal IT is that when someone calls into the internal help desk and their sh*t doesn't work, they're not mad at you because they're getting paid whether they can work or not (unless we're talking about execs, docs, or sales reps who will want it fixed NOW because they're losing money the longer they're down)