DVTAL 154 SEC maina INTERACTIVE SUMMARY med The and slate. Many component w the master controller for all the activities that a digital that acceptingut processes data stores data and performs Digitalices are constructed using tiny elec components that represent data itsas electrical signa The produces outout according to a series of stored Systemet houses the system board which contains circuito made from semicondur processing unit of most modern computers is an ng mata Computers come in three popular form tacho The instruction that all computer how to carry out a task are referred to as com puter which are distributed today's digital devices operate on battery power supplied by Ion batteries Battery life and lite assware Computers run three main types of software span can be extended by following good battery managemen software system software and development tool. An example of system software is a compractices puter system, which is essentially SECTION B: Today, there are many computer cat digital device requires consumers to select a platform based on egories. An form factor and operating system. MacOS is the operating is the category for The world's fastest computers tem that runs on Apple laptops and computers are large expensive devices capable of multe computers. The operating system for iPhones and iPade neously processing data for thousands of users Computers The used by Google and Web service providers are classified as operating system from Microsoft runs on laptop and desktop Personal computers come into PCs, whereas a derivative version is designed for phones era varieties. Ain) computer fits on The open source community produces Linux for desktops a desk, runs do power from an electrical wall outlet, and can be and servers. This family of operating systems also includes housed in a horizontal case or vertical case. Three categories Chrome OS, and of portable computers include tablets, smartphones and clam for tablets and smartphones computers Selecting a which is popular shell style SECTION C: The microprocessor is an include word size, cache size, and instruction set complex circuit which is designed to pro-ity Most digital devices contain only one microprocessor chip processors contain coss data based on a set of instructions. Most desk. but today's multi- top and laptop devices contain a microprocessor based circuitry that supports parallel processing Computers con on the standard. Most tab- tain various kinds of memory, Random lets and smartphones contain processors based on memory is a special holding area for data, program instruo technology A microproces- tions, and the system. It stores data sor's circuitry is designed to perform a limited number of on a temporary basis until the processor makes a data tasks contained in its set During request. RAM is different from disk storage because it is processing an instruction is loaded into the processor's unit. Data is loaded into registers only when the computer power is turned on. Computers also which means that it can hold data in the processor's where arith contain read- matic and logic operations are performed. Microprocessor of non-volatile memory that provides a set of "hard-wired memory, which is a type performance can be measured by its loader, that instructions, called the Seed Oper factors affecting overall processing performance a computer uses to boot up. 155 DEL DEVICES storage technologies N avera SECTION D: Today digital devices use a variety of DVD, or BD state storage technolo storage tech- gies, such as USB flash drives store data by activating elec Rologies such as hard disks store data as particles on trons in a microscopio grid of circuitry. A backup is a copy the north or south. A hard disk drive provides multiple for data storage that are sealed inside of one or more files that have been made in case the original files become damaged. A good backup plan allows you to the drive case to prevent airborne contaminants from inter restore a device's operating system, software data files set wrong with the read write heads Hard disks are less durable ting, accounts, and profies in case of a massive hardware that many other types of Morage, so it is important to make falure or virus infection Personal computer backups are typi. a copy of the data they contain stor cally recorded on hard drives, USB age technologios More data ad series of dark spots and flash drives, network servers, and online storage services. An light spots on the surface of CDs, DVDs, or BDs Storage casy way to get a backup of important data files in to the are often command to make duplicates and store used for distributing software, but you cannot alter the disc's them on a USB drive Backup ilities such as File History and technology allows you to Time Machine use a technique called file write data on a CD, DVD, or Bo, but you cannot delete or to make sure that is on two devices are the same. A disk harge that data. Rerecordable or is a bit-for-bit copy of the data from all schnology allows you to write and erase data on a CD sectors of a hard disk Sny a la by schnologies such as CD- emem ad on sklop tops udes mular SECTION E: inside a digital device, a data tion. Touchscreens use either or capac connects the processor to RAM, and live technology to process gestures Display devices receive connects RAM to a senes of expansion Images from graphics circuitry. Ain) and There are four technologies commonly used for general special video memory can enhance graphics processing and urpose ports: Thunderbolt, FireWire, Lightning, and free the main processor for other tasks. For printed output For video devices, the most com most personal computer owners select mon ports are VGA OVL and Mini jetprinters, though printers are a popu- DisplayPort Peripherals can be inserted or removed while lar option when low operating costs and high duty cycle are the host device is on, but storage devices should not be important The Internet of is a tech- Temoved without notification. To connect additional peripher-nology that links smart sensors. Some of these sensors can a when all USB ports are full, it is possible to use a USB also be found in smartphones and autonomous vehicles Some peripherals can be connected Arn can sense if a laptop computer is relessly using technology. The soft dropped or if a car brakes suddenly Ain) ware that helps a peripheral device establish communication sensor measures angular velocity. An) can be used as a compass for navigation and map displays Weh its host device is called a devica Most devices include an crystal dis- Autonomous vehicles use sensor data as input to sense-plan. algorithms processed on an onboard Play. Image quality for a display device is a factor of screen Be response rate, dat and resolu- computer 09 ata