OIS (Object-Oriented Input Library) is a code library for constructing a human-computer interface with input devices, designed so that software developers can easily use input from these devices with a computer application.
OIS (Object-Oriented Input System) is a code library for constructing a human-computer interface with input devices such as a keyboard, mouse or game controller. OIS is designed so that software developers can easily use input from these devices with a computer application.