Here are the possible solutions for one of the original top level domain name endings clue
Answer
Clue
Relevancy
org
Clue
One of the original top-level domain name endings
Definition
(short for) an organization
arpa
Clue
Top-level domain name
Definition
a top level internet domain
ptomaineconcourse
Clue
Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig
aero
Clue
Top-level domain for the aviation industry
Definition
(relating to) aircraft or aeronautics
biz
Clue
Top-level domain since 2001
Internet top-level domain since 2001
Definition
(slang) business
com
Clue
Common top-level domain
net
Clue
Generic top-level domain
Definition
to catch in an openwork fabric
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