Fixpak
Fixpak is the traditional IBM name for system or application updates that are primarily bugfix releases rather than feature updates, although some new features may be included with the supplied fixes, its use by IBM meant that most third party suppliers use the same terminology when it comes to delivery of fixes.
IBM updates to the OS/2 system were traditionally delivered in a so-called "fixpak files" which were self installing floppy disk images that you had to extract and write to floppy disks, apart from the fact that this go a bit tedious at time, most modern computer systems do not come with a floppy drive. There are utility programs available on most OS/2 related download sites that will allow you to install the fixpaks from a hard drive or a removable one.
