Page 16 - iPro_trackGPT_V5_Class7
P. 16
Projector: A projector is an output device that displays computer
content onto a large screen. It projects images and videos from a
computer onto a wide screen, making it ideal for use in classrooms,
office presentations, and cinemas. Projectors are commonly used in
educational settings, business meetings, and for showing movies.
Storage Devices
Storage devices are used to save and retrieve data on a computer. Some common types of
storage devices include hard disks, CDs, DVDs, Blu-ray discs, and flash drives.
Hard Disk: A hard disk consists of one or more magnetic platters
that store data on both sides using a magnetic head. It is commonly
used for permanent storage of program files and data. Hard disks
come in various sizes, with storage capacities reaching up to 5 TB
(terabytes) or more. Data retrieval from a hard disk is faster compared
to CDs. External hard disks, which connect to computers via USB
ports, offer additional flexibility for storing and transferring data.
The hard disk comes in a variety of sizes, with storage capacities of up
to 5 TB (terabytes) or even more. The CPU accesses data stored on a
hard disk much faster than it can access data on a CD.
External hard disks are also available. They are the hard disks that
can be connected to any computer with the help of a USB port.
Boost Bits
In 1956, IBM revolutionised data storage with the introduction of the first commercial hard
disk drive, a key component of the IBM 305 RAMAC system.
Compact Disc (CD): The CD drive reads data stored on a compact disc (CD), an external
storage device with a longer lifespan than magnetic disks. CDs can hold up to 700 MB of data.
Types of CDs:
• CD-ROM (Compact Disc Read-Only Memory): A CD-ROM
contains data that is written during manufacturing and cannot be
modified or erased.
• CD-R (Compact Disc Recordable): A CD-R allows users to write
data only once, which cannot be altered or erased.
• CD-RW (Compact Disc Rewritable): A CD-RW can be used
repeatedly to write, erase, and modify data as needed.
14 TrackGPT iPRO (V5.0)-VII

