ব্যাংক নিয়োগ প্রস্তুতি ⎯ লং কোর্স

There are three main types of secondary storage in a computer system:
- solid state storage devices, such as USB memory sticks.
- optical storage devices, such as CD, DVD and Blu-ray discs.
- magnetic storage devices, such as hard disk drives.

- A network consists of two or more computers that are linked in order to share resources.
- Integrated systems, or systems integration, are the process of bringing together component subsystems into one functional system.
- An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.

The tab key Tab ↹ (abbreviation of tabulator key or tabular key) on a keyboard is used to advance the cursor to the next tab stop.

In 1945, Professor J. von Neumann, who was then working at the Moore School of Engineering in Philadelphia, where the E.N.I.A.C. had been built, issued on behalf of a group of his co-workers, a report on the logical design of digital computers.

The microprocessor brought the fourth generation of computers, as thousands of integrated circuits were built onto a single silicon chip.
What in the first generation filled an entire room could now fit in the palm of the hand.
The Intel 4004 chip, developed in 1971, located all the components of the computer from the Central processing Unit (CPU) and memory to input/output controls on a single chip.

Magnetic audio tape is used to capture speech and music and video.
An optical scan voting system is an electronic voting system and uses an optical scanner to read marked paper ballots and tally the results.
A computer punched card reader or just computer card reader is a computer input device used to read computer programs.
Optical Mark reading (OMR) is a method of entering data into a computer system. Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms.

In Windows, the Recycle Bin is a folder or directory where deleted items are temporarily stored.(তারমানে পুরোপুরি ডিলিট হয়ে যাচ্ছে না) 
Deleted files are not permanently removed from the hard drive but are sent instead to the Recycle Bin, unless they are too large.
The files in the Recycle Bin can be restored to their original location.