Mobile OS

Mobile OS 
OS for mobile handheld devices, wireless, devices,  palm PC, pocket PCs, PDAs and phones.

Protection mechanism

Protection mechanism
A mechanism at an OS  to protect against unauthorized accesses to the resources. 

Deregistering

DeRegistering
Making it unfeasible for the RTOS to schedule like a task.

Registering a Device

Registering a Device

Making it feasible for RTOS to schedule like a task.

Linux OS

Linux OS
A powerful operating system with UNIX like features plus special device driver scheduling features and memory management features.

Fixed real time scheduling

Fixed real time scheduling
A scheduling strategy in which the time for each task is fixed.

Critical section run

Critical section run
In spite of higher priority pending, a critical section is allowed to run by a scheduler using the semaphore.