Concurrency 

providing simultaneous access to data by several users in a managed way

Anyone who uses an Airline Reservation system is in fact using a system with concurrency data control

Concurrency by Lita January 11, 2005

concurrency 

A currency whose valuation references the magnitude of transactions occurring simultaneously at any one instant. This magnitude is treated as a function of the distance between the producer and consumer.

Concurrency would make linear time a function of space.

concurrency by sandraxine August 9, 2018

I concurrently concur 

To sarcastically agree to something extremely obvious.
To be a dick.

Dude, Call Of Duty is pretty popular.

I concurrently concur.

I concurrently concur by Z Bobby Boy April 25, 2011

Concordence 

An index-type reference booklet dat tells you where key words and phrases are in da operator's manual for da infamous SST jet.

Perhaps if da crew of Air France Flight 4590 had consulted da Concordence shortly before takeoff, they might have seen da super-important directive, "Check da runway for foreign objects before beginning take-off maneuvers", and thus saved their plane from a fiery crash!

Concordence by QuacksO November 24, 2022