| Word | Description |
| chmod | The chmod (change mode) command is used to set file and directory permissions in Linux operating systems. The most common use of chmod is to grant or revoke read (r), write (w) or execute (x) permissions for an owner / user (u), a user group (g) or other / anonymous (o) users. |
| Fragmentation | Fragmentation occurs when you save a file a file on your computer's hard drive; typically this file gets broken up into pieces and stored in order to fit in on disk. As you utilize you computer, files are constantly being written, deleted, and resized, the pieces of those files can become distributed widely over the entire surface of the disk. Now your computer has to search for all pieces of a file and put it together. This will cause the performance of your computer to degrade. |
| MAMP | Macintosh, Apache, MySQL and PHP |
| XAMPP | An Apache distribution containing: Apache, MySQL, PHP and Perl. |