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Xerox Alto documents at bitsavers.org; At the DigiBarn museum; Xerox Alto Source Code - CHM (computerhistory.org) Xerox Alto source code (computerhistory.org) "Hello world" in the BCPL language on the Xerox Alto simulator (righto.com) The Alto in 1974 video; A lecture video of Butler Lampson describing Xerox Alto in depth. (length: 2h45m)
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The ideas led to the development of the Xerox Alto prototype, which was originally called "the interim Dynabook". [8] [9] [10] It embodied all the elements of a graphical user interface, or GUI, as early as 1972. The software component of this research was Smalltalk, which went on to have a life of its own independent of the Dynabook concept.
BravoX was "modeless", as was Gypsy. While Bravo (and BravoX) were originally implemented in BCPL for the Xerox Alto, BravoX was later re-implemented in a language called "Butte" ("a Butte is a small Mesa", as Charles Simonyi used to say). Alto BCPL compiled into Data General Nova machine instructions, which were in turn interpreted by Alto ...
Diablo Data Systems was a division of Xerox created by the acquisition of Diablo Systems Inc. for US$29 million in 1972, [1] [2] a company that had been founded in 1969 by George E. Comstock, Charles L. Waggoner and others. [3] [4] The company was the first to release a daisy wheel printer, in 1970. Metal Daisy Wheel for Xerox & Diablo printers
This architecture was unique because it allowed the developer to single-step even operating system code with semaphore locks, stored on an inferior disk volume. However, as the memory and source code of the D-series Xerox processors grew, the time to checkpoint and restore the operating system (known as a "world swap") grew very high.
Eventually, Microsoft's Windows operating system would follow the Macintosh and use a multi-button mouse in the same way that the Alto and the NLS system did. [ 1 ] Engelbart's influence peaked at the conference, and he was mostly remembered throughout the 1970s and much of the 1980s as the inventor of the mouse and hypertext, famously adapted ...
Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was used to print the document.