When Meena does her homework, she keeps her books and notebooks on her desk while she works. When she is done, she puts everything back in her cupboard. The next day, she takes them out again.
A computer works in a similar way! It has memory to hold information while it is working, and storage to keep information safely even when it is switched off. Let us learn about the different types of computer memory.
RAM = Your Desk — You keep only the things you are currently using on your desk. When you finish, you clear the desk. The desk does not store things permanently.
Hard Disk = Your Cupboard — You store all your books, notebooks, and files in the cupboard. They stay there even when you are not using them. You can take them out whenever you need.
RAM stands for Random Access Memory. It is the computer's working memory — the memory it uses while it is running programs.
The hard disk (also called hard drive or HDD) is where the computer stores all its files, programs, photos, and documents permanently.
Sometimes we need to carry data from one computer to another. We use portable storage devices for this.
| Device | What it is | How it is used |
|---|---|---|
| Pen Drive (USB Drive) | A small stick-shaped device that plugs into the USB port | Sita copies her project from school computer to home computer using a pen drive |
| CD / DVD | A round disc that stores data, music, or videos | Meena has a CD with her favourite Hindi songs; DVDs are used for movies |
| Memory Card | A tiny card used in phones and cameras | Ravi's father uses a memory card in his camera to store photos from a trip to Jaipur |
| Word | Meaning |
|---|---|
| RAM | Random Access Memory — temporary working memory of the computer |
| Hard Disk | Permanent storage device inside the computer |
| Storage | Keeping data safely for later use |
| Pen Drive | A small portable USB storage device |
| CD / DVD | Round disc used to store data, music, or videos |
| Temporary | Lasting only for a short time; not permanent |
| Permanent | Lasting for a long time; not lost when power is off |
In your notebook, draw two columns. Label them "Temporary Memory" and "Permanent Storage". Now sort these items into the correct column:
Items: RAM, Hard Disk, Pen Drive, Working memory, CD, Cupboard analogy, Desk analogy
Then write one sentence explaining why RAM is important for a computer.
Want to use this as a worksheet? Switch to the A4 printable view.
A computer has memory to hold information while it is working, and storage to keep information safely even when it is switched off. RAM is like your desk -- you use it while working. The hard disk is like your cupboard -- it stores things permanently.
RAM (Random Access Memory) is the computer's working memory. It holds data only while the computer is on.
When Ravi opens a game, it loads into RAM. When he switches off the computer, the RAM is cleared -- just like clearing a desk!
RAM is temporary -- data is lost when the computer is switched off. More RAM means the computer can run more programs at once.
The hard disk stores all files, programs, and documents permanently. Data stays on the hard disk even when the computer is switched off. Arjun saved his school project on the hard disk -- it will be there tomorrow!
| Device | What it is | Use |
|---|---|---|
| Pen Drive | Small stick-shaped USB device | Carry data from one computer to another |
| CD / DVD | Round disc | Store music, videos, or data |
| Memory Card | Tiny card for phones/cameras | Store photos and videos |
| Word | Meaning |
|---|---|
| RAM | Temporary working memory of the computer |
| Hard Disk | Permanent storage device inside the computer |
| Pen Drive | A small portable USB storage device |
| Temporary | Lasting only for a short time; lost when power is off |
| Permanent | Lasting for a long time; not lost when power is off |
Sort these items into the correct column below:
Items: RAM, Hard Disk, Pen Drive, CD, Working memory, Permanent storage
| Temporary Memory | Permanent Storage |
|---|---|