"RL-TCPnet is designed as a stand alone TCP/IP Operating System. This means it does not need any external RTOS or File System to run. It has an integrated tiny task scheduler that manages timeouts, events, and internal tasks." Are the tiny task scheduler preemptive?
It helps with forums who detects a browser reload or backward/forward and realizes that the user doesn't want to add a duplicated post.
My browser warns about reload or backward/forward of a posted page, but I have manageed to double-post twice (that I know/remember) to this forum because I have pressed back once and then got a call or similar and later thought that I had forgotten to press send.
The feature is easy to add to a web service and helps a lot.