What does programmable in programmable devices mean?

Answer:
Programmable devices can be customized by users for their application. Consider the difference between a Read Only Memory (ROM) and a Programmable Read Only Memory (PROM). A ROM is programmed by the manufacturer and delivered to the user. The function of the ROM is the same no matter who uses it. A PROM is a type of ROM that is delivered blank to the user. The user can store a custom program on the PROM to tailor the device for their application. In short, a programmable device can be customized by the user.
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