Multithreading In computing: Mode of operation of a computer's CPU, in which it can execute totally independent task codes by returning one code and then another. Since the channels and read from memory or fixed disks is lower than the electronic processing speed, the CPU is capable of processing multiple applications "simultaneously" without clutter. Moreover, to feed it more quickly you have cache memories, which store the most frequently required codes in a repetitive way, as could be a routine of "written amount" in a process of issuing payment checks. There is a second form of multithreading and it is when the computer has several processors or CPUs, which are powered simultaneously. This allows for enormous processing speed, as might be required in case of manipulating big data or in cases of double or triple redundancy required, such as in the launch of a manned rocket or a space telescope.