The parametres for windows to be used between origin andd destination remain yet undefined. Control of flux is done using windows and acks. 1979: microprocessor Motorola 68000 of 16 Megabytes of 16 bits at 8 Megahertz (in Apple, using a version of Unics operating system). 1972: Usenet for News Groups of Duke University, working through Unics operating system. 1979: Usenet news groups start from Duke University. 1979: microprocessor Zilog Z-8000 of 16 Megabytes of 16 bits. 1975: microprocessor Zilog Z-80 of 64 Kilobytes of 8 bits (used in many microcomputers). With up to 3.8 GigaHertz of clock speed, it was about 2005 the fastest x86 microprocessor in the market. Cray I inaugurated a kind of computers called "of fifth generation", that exists only in the form of a few hundreds of supercomputers, too expensive for the commercial market (between 4 000 000 and 20 000 000 Dollars). The Ethernet network system was in 1973 under development by Bob Metcalfe at the Xerox Palo Alto Research Centre, but the proliferation of local area networks or of microcomputers was not yet foreseen in late 1973, therefore the original model of Internet was based on the concept of a few national networks such as Arpanet, Packet Radio or Packet Satellite.

Some microcomputers had the P-System, and a few top of the line had one of the variants of Unics. 1974: Unics operating system re-written in C language by Dennis Ritchie, using a PDP-7 computer of Digital Equipment Corporation. 1972: Unics operating system re-written in assembly language by Kenneth Thompson, using a PDP-7 computer of Digital Equipment Corporation. The cue is arguably the most important piece of equipment in billiards. The new protocol was applied to Arpanet, Packet Radio and Packet Satellite. The group of Mister Cerf at Stanford defined a detailed specification for it, making possible the inter-operability of Arpanet, Packet Radio and Packet Satellite. 1974: microprocessor Motorola 6800 of 64 Kilobytes of 8 bits (used in Tandy Radio Shack). 1978: microprocessor Intel 8086 of 1 Megabyte of 16 bits (used in the first IBM Personal Computer-XT). Like the IBM Personal Computer, the Osborne I had two drives for removable floppy disks of 5.25 inches, used to boot-strap the operating system and for storage (most microcomputers of those years had no fixed -hard- disk). August 1981: Personal Computer, successful series of microcomputers of 16 bits (International Business Machines). 1981: OS/2 graphic operating system (Microsoft Corporation and International Business Machines, later continued only by the latter).

1981: MS-DOS, Micro Soft Disk Operating System, of 16 bits (Microsoft Corporation, based on 86-DOS), initially identical to PC-DOS, but afterwards modified and continued only by Microsoft Corporation. 1980: microprocessor National 16032 of 16 Megabytes of 32 bits. With 4300 elements, it could add two numbers of 8 bits in 1 microsecond. The original idea for the protocol is definitely separated in two protocols: TCP to control flux or recuperate lost packets, and IP to address or route packets. Destination can choose when recognition should be done, each ack returned is cumulative for all packets received. American Standard Code for Information Interchange (ASCII), another standard of characters, which can be read by humans or can also be executed as a programme, through another programme that will act as a translator or as an interpreter (for example, a user agent for Hyper Text Mark-up Language). After three years trying to convince Intel, Mister Kildall formed his own company, Intergalactic Digital Research, which marketed CP/M in 1976 with the name of Control Programme for Microcomputers or Control Programme Monitor.

Although this meant that a programme written in Microsoft Basic could now call subroutines written in any of the other Microsoft languages, it also meant that IEEE mathematics was no longer an option, it became mandatory. Basic was one of the very first programming languages intended to be used interactively, since Dartmouth Basic 1. Almost immediately Basic became so succesful that in October of its first year, 1964, some modification was done into it, thus making its third dialect now called Dartmouth Basic 2. Several dialects were produced over the years, all implemented as compilers by undergraduate teams working under the direction of the original designers. What exists now is descended from what existed before. 1976: first book on Arpanet, by Leonard Kleinrock. Never sold, it incorporated the first magnetic floppy disk. Originally distributed in magnetic floppy disks of 5.25 inches, it became incorporated into Apple II computers. In one of the big computers of the Massachussetts Institute of Technology, they emulated the Intel 8080 microprocessor that had been incorporated in the Altair 8800 microcomputer. This modified microcomputer was sold at 500 Dollars. Units began to be sold in 1975 at a price of 300 Dollars as a kit with all its physical parts and assembling instructions, or else sold as a finished microcomputer at the price of 400 Dollars.

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