The basic unit memory of measurement computers use is a bit. A bit represents a 0 or a 1, and you can think of it as a kind of on or off switch. When the switch is on and electricity is running, that’s a 1. When the switch is off and the electricity stops flowing, that’s a 0. In a nutshell, all a computer does is manage these pulses of electrical energy, these ones and zeros.
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Memory

Memory, or random access memory (RAM), is a special part of your computer that is designed to hold
temporary information. It’s very fast, but it’s also volatile—it goes away when you turn off the computer or when battery power is removed. Whatever a program is doing at any given moment needs to be tracked in memory. Managing memory is one of the OS’s most important jobs.
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