Weak Copy Protection
In early versions of Apple's Macintosh Operating System, the "bozo bit" was one of the flags in the Finder Information Record (also called the "no copy" flag in some documentation), which described various file attributes. When the bit was set, the file could not be copied. It was called the bozo bit because it was copy protection so weak that only a bozo would think of it, and only a bozo would be deterred by it. After Mac System 4, introduced in early 1987, the Finder ignored this bit.
The cassette and ROM filing systems and the Advanced Disc Filing System of Acorn MOS feature a rudimentary copy protection mechanism where a file with a certain flag set cannot be loaded except to execute it.
Read more about this topic: Bozo Bit
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