What Does QR Stand For?
QR stands for "Quick Response" — named for the code's core design goal of being decoded at high speed, which mattered enormously for its original use tracking parts on a fast-moving automotive assembly line.
The name comes directly from Denso Wave's 1994 design brief: the barcodes used for parts tracking at the time were too slow to scan and held too little data. Engineer Masahiro Hara set out to build something a scanner could read near-instantly even at speed, and the finder-pattern design that resulted became the QR code.
At the time, Denso Wave (a subsidiary of Toyota) was tracking automotive parts using 1D barcodes, which could only hold a small amount of data and required a fairly slow, careful straight-on scan. As parts inventories grew more complex, workers were having to scan multiple barcodes per component just to capture all the necessary information, which was eating up time on the factory floor. "Quick Response" described the specific goal: cut that scan time down dramatically by holding more data per code and reading it near-instantly from any angle.
The three-corner finder pattern (see that entry) was the key design breakthrough that delivered on the "quick" part of the name — it let a scanner instantly locate and orient the code without a careful straight-on approach, unlike the 1D barcodes it replaced. Combined with a two-dimensional data grid instead of a single row of lines, the result was a code that scanned faster and held vastly more information in the same physical space.
Denso Wave made the QR code specification openly available and patent-free for standard use from the start, rather than licensing it — a decision that's a large part of why the format spread so far beyond its original automotive-parts use case into general consumer and marketing applications over the following decades.