Megabytes (Mb), Gigabytes (Gb) and Terabytes (Tb) are common words to describe computer storage. A pen-drive (USB device) could store as little as 32Mb of data - a typical DVD can store 4.7Gb, and modern hard-drives are being produced that can hold a 10Tb or more !
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Megabyte, Gigabyte, Terabyte and Exobyte ( equal to one quintillion bytes 1,152,921,504,606,846,976 bytes - 10246, or 260 or 1,000,000,000,000,000,000 bytes - 10006, or 1018 ( 64 bit os's only ))
For electronic memory, the units are bytes and its multiples: kilobytes (103 bytes), megabytes (106 bytes), gigabytes (109 bytes) and terabytes (1012 bytes). Although there are prefices indicating memories that are larger still, they are not in common use. Also, nowadays, a byte (or even a kilobyte) is too small to be in common use.
Computer memory that is RAM is measured in Megabyte, Gigabyte & Terabyte
Storage is measure in Megabyte, Gigabyte & Terabyte
RAM (Random Access Memory) is typically measured in units such as megabytes (MB) or gigabytes (GB) to denote its storage capacity.
RAM speed is measured in MHz, PC rating or NS (nanoseconds).
A Dodge Ram 1500 is a half-ton truck. It falls into the category of light-duty trucks, which typically have a maximum payload capacity of 1,000 to 1,500 pounds or half a ton.
The main physical difference between 128MB and 256MB of RAM is the amount of memory chips present on the module. A 128MB RAM module will have fewer memory chips compared to a 256MB RAM module, resulting in the difference in capacity. These memory chips are responsible for storing the data and allowing the computer to access and use it when needed.
Some features of a system unit include the motherboard, processor (CPU), memory (RAM), storage devices (hard drive or SSD), power supply, and expansion slots for additional components such as graphics cards. The system unit houses and connects all these components together to form a functional computer system.