This practice is followed by electronics catalogs and many electronic equipment manuals. Norton wrote several other technical manuals and introductory computing books. It was never referred to as such in any official training or technical manuals. However he does speak in the stories written in some games' instruction manuals. Examples of spiral-bound books include teachers' manuals and puzzle books (crosswords, sudoku). Navy and Marine squadrons use the same NATOPS aviation manuals and procedures. This made it particularly suitable for the creation manuals and other long-format documents. Calling Standard and the OpenVMS Programming Concepts manuals. The NHTSA has published numerous training manuals associated with SFSTs. The official UK MOT inspection manuals are available online. During two of these years, Pirsig continued working at his job of writing computer manuals. There are also two sex manuals and an art book. There are also a number of commentaries and ritual manuals. The company began by producing detailed flight manuals, hence its name. Most of the writings consist of prose including chronicles, popular stories and scientific manuals.