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No, they're Erasable Programmable Read-Only Memory. An EPROM is not just a PROM that's been made writable, it's a completely different creature with completely different underlying technologies for the storage, writing and (in the case of the EPROM) resetting/erasing. You cannot equate the two. They are mutually exclusive. You might as well say a PROM is just a writable ROM, which is also quite false

You are losing it.

Are EPROM's Programmable Read-Only Memory?

Yes.

Does PROM = Programmable Read-Only Memory?

Yes

Is Erasable Programmable Read-Only Memory, Programmable Read-Only Memory?

yes.

Now you are just acting like a bozo.

You are using the same faulty logic you used in conjunction with firmware and software.

Different types of ROM (Read-Only Memory):
ROM
PROM
EPROM

Different types of PROM's (Programmable Read-Only Memory):
PROM
EPROM

An EPROM (erasable programmable read-only memory) is a special type of PROM that can be erased by exposing it to ultraviolet light.
-webopedia

EPROM is a type of PROM. The fact it can be erased does not change the fact it is Programmable Read-Only Memory.

Give it up - you are getting irrational.

An EPROM (erasable programmable read-only memory) is a special type of PROM that can be erased by exposing it to ultraviolet light. -webopedia

Webopedia isn't a good source. You might want to find someone who has actually worked with these, like me.

The fact it can be erased does not change the fact it is Programmable Read-Only Memory.

You cannot take a PROM and make it erasable. You have to develop a completely new device using a completely different technology in order to develop an EPROM. One is not derived from the other. They are completely separate.