The first successful visual input system for computers was the barcode. Norman Woodland's original invention from 1949 was a circle code he sold to RCA before moving to IBM. It was based on the Morse Code. First public use was on July 3, 1972. http://pdfpiw.uspto.gov/.piw?Docid=02612994&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D2612994.PN.%2526OS%3DPN%2F2612994%2526RS%3DPN%2F2612994&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page …pic.twitter.com/LOuOGrkmYA
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.