An independent part of a program. Much of Apache’s functionality is contained in modules that you can choose to include or exclude. Modules that are compiled into the the Apache httpd binary are called static modules, while modules that are stored seperately and can be optionally loaded at run-time are called dynamic modules or DSOs. Modules that are included by default are called base modules. Many modules are available for Apache that are not distributed as part of the Apache HTTP Server tarball. These are referred to as third-party modules.
A section of a rocket that is for a specific use. In the early days of space exploration, rocket systems were designed with two or three modules, consisting of the propulsion module (a multiple stage rocket engine system), the command module (main orbiting unit and recovery system), and if a lunar landing was in order a lunar module (aka LEM or Lunar Excursion Module). Each of the modules had a specific use and once used could be discarded. Advances in technology has rendered the module system nearly obsolete.
