Typically, when sent over e-mail or transferred via FTP or the Web, these archives will also be encoded in MacBinary II or BinHex, which add either a .bin or .hqx, respectively, after the .sit or .sea extension. StuffIt Expander is a simple application for decoding many kinds of encoded, compressed, and archived files. Developed primarily for Mac OS, there is also a version available for Windows. Style sheets are used to determine the appearance of HTML pages in a browser. They provide an easy way to change the visual appearance of a group of HTML files without changing each individual file.
All disks have directories in which they store files.
The directories can also store other directories, which are then called subdirectories. Generally, any directory, except for the main or root directory, is called a subdirectory. If a series of instructions are to be used many times in other sections of a program, it's possible to group these instructions together as a subroutine. Other portions of the program can execute the batch of instructions within the subroutine by merely calling that subroutine. Subroutines are identified by names and can often accept parameters to make their functions more generic.