http://www.fmi.uni-passau.de/archive/doc/unix/unixhelp/Unixhelp/emacs_ue_mving.html (Einblicke ins Internet, 10/1995) Moving, Copying and Deleting blocks of text
A block of text is referred to in MicroEMACS as a
'region'. It is defined by the position of a special
'mark' at one end, and by the cursor (referred to as
the 'point') at the other.