what is MCU ？

Is the abbreviation of MCU Microcontroller Unit, is the micro controller.
http://www.siliconray.com/catalogsearch/result/?q=mcu
Also called SCM (Single Chip Microcomputer), it is to point to as the emergence of large scale integrated circuit and its development, will the computer's CPU, RAM, ROM, timing, and a variety of number I/O interface integration in a Chip, form the computer Chip level. According to the memory type MCU can be divided into MASK (masking) ROM, OTP (one-time programmable) ROM, FLASH ROM type etc. In recent years is the development trend of rising level of integration, including for limited digital signal processing function modules and analog circuit, and its application is also more and more widely.