Term that comes from the words PEL (picture element). A px (pixel) is the smallest portion of an image or display that a computer is capable of printing or displaying.
The optical disc makes use of laser technology: digital data are recorded by burning a series of microscopic holes, or pits, with a laser beam into thin metallic film on the surface.
Floppy Disk Maximum capacity of Storage Data is : 2.8 MB (i.e. in MB)
Compact Disk Maximum capacity of Storage Data is : CD-700MB DVD - 4GB to 16GB (i.e. in GB)
Pend Drive Storage Capacity is : 1GB to 28,64 GB
but Hard Disk can Store data in Terabyte (TB) like 1 TB and so on so the Hard Disk has the height Capacity to Store Data.
EPROM stands for Erasable Programmable Read-only Memory. It is a programmable read-only memory that can be used for erased and re-used.
Memory unit is one part of central processing unit. there are two types of memory in a computer unit which is primary memory and secondary memory.
The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. It tells the computer's memory, arithmetic and logic unit and input and output devices how to respond to the instructions that have been sent to the processor.
The performance of cache memory is frequently measured in terms of a quantity called Hit ratio.
Hit ratio = hit / (hit + miss) = no. of hits/total accesses
Then binary numbers are commonly used in digital and computer circuits and are represented by either a logic “0” or a logic “1”. Binary numbering systems are best suited to the digital signal coding of binary, as it uses only two digits, one and zero, to form different figures.
A scanner is an input device that scans documents such as photographs and pages of text. When a document is scanned, it is converted into a digital format. This creates an electronic version of the document that can be viewed and edited on a computer.
The programs which are as permanent as hardware and stored in ROM are known as Firmware.
Abacus, plural abaci or abacuses, calculating device, probably of Babylonian origin, that was long important in commerce. It is the ancestor of the modern calculating machine and computer.
Data processing is, generally, "the collection and manipulation of items of data to produce meaningful information."