Electrically Addressed
Electrically addressed semiconductor non-volatile memories can be categorized according to their write mechanism. Mask ROMs are factory programmable only, and typically used for large-volume products not required to be updated after manufacture. Programmable read-only memory can be altered after manufacture, but require a special programmer and usually cannot be programmed while in the target system. The programming is permanent and further changes require replacement of the device. Data is stored by physically altering (burning) storage sites in the device.
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“A noble person confers no such gift as his whole confidence: none so exalts the giver and the receiver; it produces the truest gratitude. Perhaps it is only essential to friendship that some vital trust should have been reposed by the one in the other. I feel addressed and probed even to the remotest parts of my being when one nobly shows, even in trivial things, an implicit faith in me.... A threat or a curse may be forgotten, but this mild trust translates me.”
—Henry David Thoreau (1817–1862)