Human and Computer

How human being interact with computer

As discussed above computer itself is a machine, which interacts with tools under rules & regulations pre-defined by human being. Each task given to computer executed stepwise, systematically & strictly under certain rules & regulations, which cannot be neglected, otherwise computer won't execute the task.

How to interact with computer
To accommodate communication between man & computer - it is a systematic task. Since the computer is machine, so we should first understand the 4 levels through which a task goes systematically before execution.
But to understand the execution of given task let us assume computer as VIP, who gives command to execute without obstacles.

Level1 (Hardware level)
Let's assume that the computer is a VIP (Very Important Person), living in a diplomatic area. Each VIP required highly professional expert to carry out orders of VIP to fulfill the order as efficient as possible. These orders include: organizing meetings & appointments, personnel assistance, planning, providing security etc. The orders fulfilled by highly professional experts.
Similarly, computer does editing, printing, storage, documentation, which is fulfilled by accessories of computer called Hardware i.e. Printers, plotters, Floppy Disk Drive, Hard Disk Drive, CD drive etc about whom we will discuss later.

Level 2 (BIOS Level)
Each VIP as a human being in his life well illiterate to the basic rules & regulations of Humanity written in the Holy Book of Ramayana / Mahabharata, Bible, Kuran, which gives him peace of mind & reminds him continuously throughout life. The whole life of Human Being is equipped with these basic moralities.
Similarly, in computer each task basically is followed by certain pre-defined & pre-programmed rules & regulations embedded in the BIOS and stored in ROM (Read Only Memory) chip of the Computer system. BIOS (basic input/output system) are just like rulebook.

Level 3 (Operating System)
Each order of VIP can't be followed by a single action. But it needs series of actions to execute. Which again need lot of resources to get desired result. How to manage these resources? It is more difficult task in daily life, which is managed by adequate & specialised Manager. Manager manages all activities as well as existing resources against a single command of VIP.

In Computer similarly all commands as well as resources like memory, printer etc. are managed byOperating System. It also form environment under which task has to execute to achieve the desired result. Depending upon how many users can simultaneously use the computer, it can be termed as single user operating system like MS-DOS and multi-user OS like Windows 98.

Level 4 (Software)
To provide perfect security to the VIP, it is necessary to design a language understandable to VIP & his personnel secretary to communicate with each other.Computer, as a machine communicate with hardware in a language called machine language. To understand the machine language it is a very difficult task for user. To simplify this task, machine language is designed in a very simplified manner, which contain typical English word called application software language or just computer software language.

In Brief:
VIP gives command in code language to his Manager, which, in the given infrastructure is fulfilled by the expert peoples.
Computer similarly gives command to fulfill the given task, which managed by OS through software and finally fulfilled by Hardware of computer under rules and regulations pre-programmed in the BIOS stored in ROM.