For example, ctrl-a means "select all".
For ctrl-x, ctrl-c and ctrl-v, see also Cut and paste and Copy and paste.
External link
... Contents 242 Centuries: 2nd century - 3rd century - 4th century Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s Years: 237 238 ...