ISSN - Wikipedia Jump to content From Wikipedia, the free encyclopedia (Redirected from International Standard Serial Number Serial number used to identify a periodical publication Not to be confused with ISBN For the use of ISSNs on Wikipedia, see Wikipedia:ISSN International St…

QR code - Wikipedia Jump to content From Wikipedia, the free encyclopedia Type of two dimensional barcode A QR code for the URL of the English Wikipedia Mobile main page QR code , short for quick-response code is a type of two-dimensional matrix barcode invented in 1994 by Masahi…