SECTION A: A computer is a multipurpose device the master controller for all the activities that a digital device that accepts input, processes data, stores data, and performs. Digital devices are constructed using tiny electronic produces output, all according to a series of stored components that represent data bits as electrical signals. The system unit houses the system board, which contains several The processing unit of most modern computers is a(n) circuits made from semiconduct ing materials. Computers come in three popular form factors: , and slate. Many of The instructions that tell a computer how to carry out a task are referred to as com component, I, which are distributed today's digital devices operate on battery power supplied by ion batteries. Battery life and life puter as software. Computers run three main types of software software, system software, and span can be extended by following good battery management development tools. An example of system software is a com- practices puter D system, which is essentially digital device requires consumers to select a platform based on SECTION B: Today, there are many computer cat. egories. A(n) the world's fastest computers computers are large, expensive devices capable of simulta- neously processing data for thousands of users. Computers used by Google and Web service providers are classified as s the category for form factor and operating system. MacOS is the operating sys tem that runs on Apple laptops and computers. The operating system for iPhones and iPa ds is The operating system from Microsoft runs on laptop and desktop PCs, whereas a derivative version is designed for phones. The open source community produces Linux for desktops Personal computers come in se eral varieties. A(m) a desk, runs on power from an electrical wall outlet, and can be dservers. housed in a horizontal case or vertical case. Three categories of portable computers include tablets, smartphones, and clam- shell style SECTION C: The microprocessor is a(n) include word size, cache size, and instruction set complex Chrome OS, and which is popular for tablets and smartphones computers. Selecting a circuit, which is designed to pro- ity. Most digital devices contain only one microprocessor chip contai ata based on a set of instructions. Most desk but today's multi proces top and laptap devices contain a microprocessor based circuitry that supports paraliel processing. Computers co standard. Most tab- tain various kinds of memory. Random on the lets and smartphones contain processors based on memory is a special holding area for data, program instruc system. It stores dat sor's circuitry is designed to perform a limited number of on a temporary basis until the processor makes a data set. During request. RAM is different from disk storage because it is which means that it can hold data unit. Data is loaded into registers only when the computer power is turned on. Computers also memory, which is a type technology. A micraproces- tions, and the tasks contained in its processing, an instruction is loaded into the processor's where arith contain read- in the pracessor's metic and logic operations are performed. Microprocessor of non-volatile memory that provides a set of hard-wired performance can be measured by its speed. Other factors affecting overall processing performance a computer uses to boot up instructions, called theloader, tnat