Library /sys$common/syshlp/edthelp.hlb SET, TERMINAL, EDIT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 This option indicates that your terminal has the screen editing features
 of the VT102.  These are IL (insert line), DL (delete line), ICM (insert
 character mode) and DCH (delete characters).