Väga vajalik vahend töö käigus on ka spetsiaalne kinnas, mis hoiab ära ekraani pidevast hõõrdumisest, naha rasvadest ja higist. Pealegi, kinnas hoiab pinda puhtana, ei pea pidevalt lapikesega pühkima plekkidest või tolmust vabanemiseks. Selline joonistuskinnas aitab kasutajal teha täpsemaid ja sujuvamaid jooni, mis teeb joonistamise nauditavamaks. Digilaua ajalugu Esimest elektroonilist käekirja edestavat lauda masinale nimetati Teleautograafiks (inglise keeles Telautograph), mille patenteeris Elisa Gray aastal 1888. Kuid Elisa Gray on paremini tuntuks saanud telefoni leiutamisega samaaegselt Alexander Graham Belliga Digilaud info sisendina Digilaud ehk graafikalaud on sisendseade, mis võimaldab arvutisse sisestada maale, jooniseid, skeeme. Digikomplekt koosneb tavaliselt elektroonilisest lauast ja krihvlist ehk digipliiatsist. Digihujpliiats näeb välja nagu pastapliiats, kuid sisemuses peitub pastatuubi asemel mikrokontroller
their peacetime tightness; crypto-logically, the physical difficulties forced Army communi- cators back onto the two-tape system, and the demonstrated solvability of this threw the whole Vernam arrangement into temporary limbo. The Army revived it in a hurry as SIGTOT when World War II loomed, but by then Vernam was well out of it. He had continued developmental work at A. T. & T. for several years. He improved his own system,* invented a device for enciphering handwriting during telautograph transmission, and came up with one of the earliest forms of binary digital encipherment of pictures—another precocious development. He was so good that he was grabbed off at a substantial raise by International Telephone and Telegraph Corporation's research subsidiary, International Communication Laboratories, which was doing some cryptographic work. Four months later the stock market crashed. Vernam, with no seniority, was soon out. He went to Postal Telegraph
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