Page 13 - iPrime_V2.2_class4
P. 13

Memory Card

                 It is commonly known as a multimedia memory card. It is very
                 small in size, usually 1–1.5 inches. These are used in mobile phones
                 and digital cameras. You need to have a card reader to read the
                 data stored on the 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 laptops come
                 with SSD instead of traditional hard disk.
                                                                                                   SSD
                     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, i.e., 1 byte equals 8 bits. A group of 4
                 bits is known as a nibble (half a byte), for example, 1001 i.e., 1 nibble equals 4 bits.
                 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.


                                                    1 KB        =  1024 B
                                                    1 MB        =  1024 KB

                                                    1 GB        =  1024 MB
                                                    1 TB        =  1024 GB
                                                    1 PB        =  1024 TB
                                                    1 EB        =  1024 PB

                                                    1 ZB        =  1024 EB
                                                    1 YB        =  1024 ZB




                                                                        Computers—Storage and Memory Device        11
   8   9   10   11   12   13   14   15   16   17   18