Computer Basics · Lesson 1 of 6
What a computer is doing
Understand the parts of a computer and what happens when you use it, without jargon.
Start with no assumptions. A computer has a few parts and each does one job.
The PROCESSOR does the thinking — it follows instructions, very fast. RAM (memory) is the desk it works on: whatever you have open right now sits there, and it empties when the power goes. STORAGE — a hard disk or SSD — is the cupboard: your files stay there when the machine is off. This is why an unsaved document disappears in a power cut and a saved one does not; the work was on the desk and never went into the cupboard. That single distinction explains most beginner losses, and load-shedding makes it a Pakistani problem specifically. Save often.
The SCREEN, KEYBOARD and MOUSE are how you and the machine talk to each other. The OPERATING SYSTEM — Windows on most machines here, sometimes macOS or Linux, and Android on your phone — is the program that runs everything else and gives you the desktop, the windows, and the way files are organised.
A PHONE is a computer too, with the same parts in a smaller case. If you can use WhatsApp, you already understand more than you think: apps, files, storage filling up, connecting to wifi. This course connects that familiarity to the machine on a desk.
WHAT YOU SEE ON WINDOWS: the DESKTOP is the background with icons. The TASKBAR runs along the bottom, showing what is open and holding the Start button. A WINDOW is one program's rectangle, and it can be minimised (hidden but still running), maximised (full screen) or closed (finished — and closing without saving is how work is lost). Many programs can be open at once, which is why machines slow down: too much on the desk at one time.
FILE EXPLORER is the program that shows your files and folders, and it is the single most important thing to be comfortable with — lesson 2. On a phone it is called Files.
One more idea worth having early: almost nothing you do can permanently break the computer. Clicking to find out is how everyone learns. The things worth caution about are deleting files, installing unfamiliar programs, and typing your password into pages you did not expect — and lesson 5 covers those.
Sit at a computer and identify each part physically. Then open three programs at once, switch between them from the taskbar, minimise one, maximise another, close the third. Check how much storage your machine has (This PC in File Explorer) and how much is free. Ten minutes, no reading — the confidence comes from touching it.
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