Redundant acronyms

[Randal Twede]

The first one I noticed was pcv valve:pollution control valve valve.
How about abc bank:American bank of commerce bank bank.
Or, similar. FedEx express:federal Express express.

I'm sure some of you  have run into others.

[Paul Clapham]

Yeah, I thought of "ATM machine" which means "automated teller machine machine". But when I searched the web for that it led me to a Wikipedia page which noted that it was redundant and pointed to another Wikipedia page about RAS syndrome (which is also a redundant acronym which describes the general phenomenon of redundant acronyms.

[Ron McLeod]

Paul Clapham wrote:"ATM machine" which means "automated teller machine machine"

and the PIN number that you enter at the ATM machine

[Campbell Ritchie]

PIN and RAS might be acronyms, but the others aren't. They are initialisms, the difference being that an acronym can be pronounced as a single word.

[Stephan van Hulst]

That reminds me of people pronouncing "sql" as "sequel", which drives me nuts.

[Campbell Ritchie]

There was an older similar language called SEQL, which should be pronounced sequel.

[fred rosenberger]

Randal Twede wrote:FedEx express:federal Express express.

I've never heard anyone call it "FedEx Express".  I've only ever heard "FedEx" or "Federal Express".  

[Tim Moores]

JSP pages

[Stephan van Hulst]

To be fair, I don't find repetition such as JSP pages redundant. "Java Server Pages" is the name of a technology or standard. A "Java Server Pages page" is a template that makes use of that technology.

Contrast PIN, which literally refers to the actual number. A "personal identification number number" makes no sense.

[Tim Holloway]

Stephan van Hulst wrote:Contrast PIN, which literally refers to the actual number. A "personal identification number number" makes no sense.

Except that in some cases, I've seen "PIN" used to refer to non-numeric security codes. I think, for example Windows 10 used the term for the login screen. So not only redundant, but inaccurate.