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| Wednesday, October 31, 2018 |
| Term |
Definition |
| Nanosecond, ns |
One billionth of a second. Memory data access times are measured in nanoseconds. For example, memory access times for typical 30- and 72-pin SIMM modules range from 60 to 100 nanoseconds. |
| Non-Volatile Memory |
Types of memory that retain their contents when power is turned off. ROMs, PROMs, EPROMs and flash memory are examples. Sometimes the term refers to memory that is inherently volatile, but maintains its content because it is connected to a battery at all times, such as CMOS memory and to storage systems, such as hard disks. |
| Noncomposite |
A term created by Apple Computer, Inc. that describes a memory module which uses 16-Mbit technology. For a given capacity, a noncomposite module will have fewer chips than a composite module. |
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