The next page has a collection of circuit symbols. You might ask why put such a page in here. The answer is that these symbols are drawn according to nationally recognized standards. In general, standards are good because they help avoid misunderstanding and help people recognize patterns quickly. This feature is particularly important when larger patterns have meaning. The ARRL uses a standard for their circuit symbols but their standard is slightly different than many others and I always find it slightly time consuming to read their schematics.
One of the things our computers can do, is to draw standard picture. However circuit symbols are not built in so somebody has to program them in individually on the ZX81 and as user defined graphics on the TS 2068. If one is to go to the trouble of programming the symbols one should start with a universally accepted pattern rather than the symbols used in the first magazine picked up. Hence the accepted patterns on the next page.
Unfortunately there is no set of universally accepted symbols. The ones used in Europe and some other parts of the world differ from the ones recommended in the US.
On the next page there are two symbols for most circuit elements, one with an American background and another with a European background.
If anybody does program them into one of our Computers, I would appreciate it if you would tell me about your efforts.