CANETE, Jivan Ray GOMEZ, Edgar Jr. JITO, Louisan Veth

STORE UNIT- saves data and instructions to make them readily available for initial or additional processing whenever required. Storage may refer to the computer’s hard disk and holds the following: -Data and instructions for processing -Intermediate results of processing -Final results of processing MEMORY- is required to store files

MEMORY TERMINOLOGY BIT- from the words binary digit, smallest unit of information in a computer. Bit is represented by numbers 1 and 0 BYTE- built from bits. A byte is composed of 8 bits. It provides enough possible patterns to represent a character

1 byte(B)1 character or 8 bits pattern 1 Kilobyte(KB)1024 bytes 1 Megabyte(MB)1024 Kilobytes1,048,576 bytes 1 Gigabyte(GB)1024 Megabytes1,073,741,824 bytes 1 Terabyte(TB)1024 Gigabytes1,099,511,627,776 bytes EQUIVALENCE

TYPES OF STORAGE A. PRIMARY STORAGE- is where data are stored while processing is done. It is volatile and temporary  RAM- computer memory used to store given instructions which can later be changed or erased. It involves reading and writing

 ROM-contains stored instructions that a computer requires to be able to do its basic routine operations

 BIOS- set of routines that work closely with hardware to support transfer of information

 Caching- storing of frequently used data in extremely fast RAM that connects directly to the CPU  Virtual memory- space on a hard disk used to temporarily store data and swap it in and out of RAM as needed

B. SECONDARY STORAGE- where data are stored permanently. It provides cheap, non-volatile high capacity storage  DIRECT ACCESS MEDIA- supports sequential or random access where data can be accessed directly. Examples are floppy disk, hard disk and flash drive  SEQUENTIAL ACCESS MEDIA-where data are accessed in a specific order. An example of this is a magnetic tape

Secondary Storage Devices Sequential AccessDirect Access Devices Device Magnetic TapeMagnetic Disks Optical Disks Memory Storage -CD-ROMDevices -CD-RW -Flash Drive Floppy Disk Hard Disk -DVD -Memory Card -MOD

Commonly Used Mass Secondary Storage Devices Magnetic Tape- sequential access storage where blocks of data are stored serially along the length of the tape.

Magnetic Disk- is a direct access storage media which is divided into tracks and sectors a. hard disk-is often used as an extension of RAM

b. Floppy disk- much slower than the hard disks. Examples of this are diskettes and ZIP disk DISKETTE ZIP DISK

Optical Disk- rigid disk of plastic in which date are recorded by special lasers that physically burn into the disk(same technology as the CD) a. Compact Disk >CD-ROM-non-erasable disk that stores computer data and can write data on the disk only once >CD-Rewritable- can erase and rewrite data on the disk up to 1,000 times Compact Disk

b. DVD-contains digitized and compressed video information as well as large volumes of other digital data. (e.g. DVD,DVD-R,DVD-RW) c. MOD-a hybrid between magnetic disk and optical disk. It uses optical technology for read and magnetic recording technique with optical focusing. DIGITAL VERSATILE DISC MAGNETO-OPTICAL DISC

Memory Storage Devices Flash Drive- data storage that includes flash memory with an integrated Universal Serial Bus (USB) interface.

Memory Card-SD/MMC/CF/MSD- an electronic flash memory data storage device used for storing digital information

SOURCES: rage-vs-memory