Flash memory and Rom I think
Bios rom
Read-only memory (ROM)
---ROM--- The full of ROM is read only memory. It is nonvolatile. Nonvolatile chips always hold the same data. It holds instructions that run the computer when the power is first turned on. On ROM contains a set of start-up instructions, which ensures that the rest of memory is functioning properly. callltb@yahoo.com
Nonvolatile memory retains data even when power is cut off, like in ROM chips. Nonvolatile storage devices can be slower than volatile ones as they often use technologies such as flash memory. This type of memory is commonly used in devices like USB drives and solid-state drives.
The Hard Disk installed in your computer is static and non volitile
ROM is involatile because its name means Read Only Memory, hinting that the data stored on it cannot be altered. The word involatile means long term and not changeable.
Generally, this is called ROM, or Read-Only Memory. Usually, such memory is used to store the BIOS, or Basic Input Output System.
1. What is the difference in volatile and nonvolatile memory?
nonvolatile memory
In what type of memory is data only written once?
Non-volatile. It retains its memory even if power is removed.