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Memory Card
Memory Card is commonly known as multimedia memory card. It is very
small in size usually 1—1.5 inches. It is used in mobile phones and digital
cameras. You need to have a card reader to read the stored data on a
Memory card memory card.
Solid State Drive (SSD)
An SSD is a type of storage device that holds information, like your
pictures, games, and documents. An SSD uses the technique of flash
memory to store data. It is much faster than a hard disk. SSDs are more
durable and reliable than hard disks. They come in various capacities,
typically 128 GB to several TBs. Nowadays, desktop computers and SSD
laptops come with SSD instead of traditional hard disk.
21 st
Let’s Practice Century #Technology Literacy
Skills
Visit your computer lab and find out what storage devices are available and also check
how much storage it displays. Do this under your teacher's guidance.
Suppose, you could create a virtual memory palace in your mind using a
computer. What rooms and objects would you include to help you remember
important information, like math formulas or historical facts?
MEASURING THE COMPUTER’S MEMORY
The basic unit for measuring the memory of a computer is byte. A byte consists of a group of
eight bits, for example, 10001011 has 8 bits or 1 byte. A group of 4 bits is known as a nibble
(half byte), for example, 1001 has 4 bits or 1 nibble. Other units for measuring the computer’s
memory are kilobyte, megabyte, gigabyte, terabyte, and so on.
1 KiloByte (KB) equals 1024 bytes.
1 MegaByte (MB) equals 1024 KB.
1 GigaByte (GB) equals 1024 MB.
1 TeraByte (TB) equals 1024 GB.
1 PetaByte (PB) equals 1024 TB.
1 ExaByte (EB) equals 1024 PB.
1 ZettaByte (ZB) equals 1024 EB.
1 YottaByte (YB) equals 1024 ZB.
Data Storage and Memory 11

