(computing) text file

"Clear file folder", a simple plastic sleeve (perhaps only somewhat opaque when a design is printed on it, as is common in promotional events) for holding documents, open on two consecutive sides and closed on two consecutive sides.

single mother (a woman raising a child on her own)

Alternative form of シングルファーザー

single father

double-click - an action of twice pressing the mouse button in a short second.

double-click

a right-click

to right-click

(computing) "one click" (implying that an action is done with ease)