question: scr = selective catalytic reduction
Capitalize this past sentence correctly.
A: SCR = Selective catalytic reduction

question: he considered three discs r, s, and t as typical subsets of a set u. the intersections of these discs and their complements divide u into 8 non-overlapping regions, the unions of which give 256 different boolean combinations of the original sets r, s, t.
Capitalize this past sentence correctly.
A: He considered three discs R, S, and T as typical subsets of a set U. The intersections of these discs and their complements divide U into 8 non-overlapping regions, the unions of which give 256 different Boolean combinations of the original sets R, S, T.

question: fortunately there is a facsimile reprint from 1863, which seems to be reliable (see external link).
Capitalize this past sentence correctly.
A: Fortunately there is a facsimile reprint from 1863, which seems to be reliable (see external link).