The Highway Code be taken into account by a court. The mandatory rules reflect the Statute Law, which may (and usually does) provide a separate penalty. The highway code was first published in 1931 as a booklet and has been regularly updated to reflect current practices. It is prepared by the Department for Transport and the Driver and Vehicle Standards Agency, and is published by The Stationery Office in electronic form and as a printed book. Most copies are bought by learner drivers preparing for their driving test. In 2004, for example, over one million copies of the Highway Code were sold. The
Source code distributed source code with its software product licenses, after 1999. Most early computer magazines published source code as type-in programs. Occasionally the entire source code to a large program is published as a hardback book, such as "Computers and Typesetting", vol. B: "TeX, The Program" by Donald Knuth, "PGP Source Code and Internals" by Philip Zimmermann, "PC SpeedScript" by Randy Thompson, and "µC/OS, The Real-Time Kernel" by Jean Labrosse. The source code which constitutes a program is usually held in one or more text files stored on a computer's hard disk; usually these files are carefully arranged into a directory