Please capitalize where necessary: armchair with silver covering. made by a.f. holling in copenhagen, 1740, for christian vi’s audience chamber at christiansborg palace.
A: Armchair with silver covering. Made by A.F. Holling in Copenhagen, 1740, for Christian VI’s Audience Chamber at Christiansborg Palace.

Please capitalize where necessary: transfer from london luton (ltn) airport to cambridge
A: Transfer from London Luton (LTN) airport to Cambridge

Please capitalize where necessary: did someone email you a qxt file and you're not sure how to open it? maybe you have found a qxt file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a qxt file related error message.
A: Did someone email you a QXT file and you're not sure how to open it? Maybe you have found a QXT file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a QXT file related error message.

Please capitalize where necessary: they are linked to the reception, while video, speech and call signals are also transmitted to two isdn telephones in other parts of the building via the telephone network.
A:
They are linked to the reception, while video, speech and call signals are also transmitted to two ISDN telephones in other parts of the building via the telephone network.