The simple drawing program.

Simple drawing programs can actually do many tasks in terms of art. For most diagrams, can be done without the fancy expensive software. One free program I like to use is Tuxpaint. (import exiting pictures with

usage $ tuxpaint-import filename.ext
 $ tuxpaint-import neatpic.png

There are many others depending on the computer platform you use. Of course you can do simple artwork.

You can even make prototype drawings like was done in drafting class such as a boat or even a cabinet.  Actually built both of the units.

You can even do simple electronics diagrams such as a connection for an adapter or say a connection of parts to an Arduino for a TV.out adapter.

Then you could use the drawing program to describe simple or even more complex processes such as making beer.

Last but not least, you could draw an interpretation of a local area network.

Hope you will go back and look at the simple drawing program your system uses and put it to work. If you can dream it, you can draw it. If you can draw it, you can build it.  Look at all the drawings Leonard Da Vinci has done.