Aktiebolag (literally "share company" or "stock company") is the Swedish term for "limited company" or "corporation". When used in company names, it is abbreviated "AB" or "Ab" (roughly equivalent to the abbreviations Ltd and PLC). The governmental authority responsible for registration of limited companies in Sweden is called Bolagsverket (the Swedish Companies Registration Office). In Sweden, the abbreviation is written in capital letters ("AB"), but in Finland it is written with a capital "A" and a small "b" ("Ab"). Some old companies still use an old way of writing the abbreviation, which is "A/B".

The/an after-sales market, is how a company tries to make more money from you, after you've bought something from them. They want to ensure that they keep you as their customer. Alex Tănasie's answer was excellent. I'd give him the "best answer".