+The \fBtset\fR command uses these environment variables:
+.TP 5
+SHELL
+tells \fBtset\fP whether to initialize \fBTERM\fP using \fBsh\fP or
+\fBcsh\fP syntax.
+.TP 5
+TERM
+Denotes your terminal type.
+Each terminal type is distinct, though many are similar.
+.TP 5
+TERMCAP
+may denote the location of a termcap database.
+If it is not an absolute pathname, e.g., begins with a `/',
+\fBtset\fP removes the variable from the environment before looking
+for the terminal description.