Moesi

Moesi stands for Modified, Owned, Exclusive, Shared, and Invalid. It's a system used in computer processors to store information in a way that keeps it safe and available to the right programs. In a computer processor, the storage space for information is called a cache. When something needs to be stored, a program will ask the processor for a place to store it. The processor looks at the Moesi system to decide which type of space it should give the program.

Modified means that the data has been changed by the program, and the processor needs to keep the original and the modified version together.

Owned means the program asked for the space, and the processor has made a special place for it. Only this program can use it now.

Exclusive means that no other program can use the space. It's just for the program that owns it.

Shared means that more than one program can use the information that's stored there.

Invalid means that the data is no longer needed by the program, so it's taken out of the cache.

All of these steps help the processor keep track of what's going on and make sure the right programs have access to the right information at the right time.