AutoCad is considered the standard of the architectural and engineering worlds. There are several renditions of the base program, as well as several sets of macros available that are designed specifically for entertainment lighting. AutoCAD is much more expensive than VectorWorks, but it is also free for students and teachers to use on their own computers. Also, because of the software's use in a wide range of fields, it is more likely that students will find AutoCAD installed in university computer labs.
Collection of various Drawing, Sketching, and Drafting items. When communicating with others in the production team, talking with your hands is not nearly as effective as using pencil and paper; computer and screen; callage, etc...
Design software comes in all sorts of flavors. Organizational software, drafting software, custom theatrical software applications, etc. The list is long and growing every day. Check back often for new pages.