Imperial does not internally support functions such as triggers. For this reason the majority of players use a program called a client to help ease the burden of playing and cut down on repetitive typing. Here are four links to the major clients used at Imperial.
ZMud for Windows
Zmuds is a windows driven client for users of Microsoft Win 3.x or Win95.
Wintin is a graphical multi-windowed program which will run under Windows 95 or Windows NT.
HUT TinTin for Unix
The Client for x-windows and Unix/Linux users.
Cantrip for MacOS X
The title says it all. =)