² Which files should you save? After preprocessing, compiling, assembling, and linking, your directory, which (we'll assume) originally contained first.c, will suddenly contain 7 additional files. All but first.c, first.tdl, and first.nif are nonessential to the execution of the program and can be erased if necessary. Logical Systems also provides ld-one for loading programs on 1-transputer networks. We could have used it with first.tld since it runs on only one transputer, but since most of our projects will involve several transputers, we will use ld-net exclusively.