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"analytical engine
English mathematician Charles Babbage (1792–1871) designed a mechanical computing machine called the "analytical engine." It is considered the forerunner of the digital computer, a programmable electronic device that stores, retrieves, and processes data. -
First Computers
The first substantial computer was the giant ENIAC machine by John W. Mauchly and J. Presper Eckert at the University of Pennsylvania -
estructure of the computer
.The computer was born not for entertainment or email but out of a need to solve a serious number-crunching crisis. By 1880, the U.S. population had grown so large that it took more than seven years to tabulate the U.S. Census results. -
abacum
The abacus, a simple counting aid, may have been invented in Babylonia (now Iraq) in the fourth century B.C.
The Antikythera mechanism, used for registering and predicting the motion of the stars and planets, is dated to the first century B.C. It was discovered off the coast of Greece in 1901. -
this simple demonstration circuit
this simple demonstration circuit provides proof of concept for applying Boolean logic to the design of computers -
Z1
8.The World War II years were a crucial period in the history of computing, when powerful gargantuan computers began to appear. Just before the outbreak of the war, in 1938, German engineer Konrad Zuse (1910–1995) constructed his Z1, the world's first programmable binary computer, in his parents' living room. -
.The first substantial computer
David Packard and Bill Hewlett found their company in a Palo Alto, California garage. Their first product, the HP 200A Audio Oscillator -
Z4,
Bored by having to do routine calculations, at the age of 28, Zuse (TSOO-zuh) invented the world’s first mechanical binary digital computer, the Z1 in Berlin during 1936-1938. After that, he went on to develop three more improved electronic models before 1949, culminating with the Z4, considered the world’s first programmable, digital computer -
PCs
tandardized PCs running standardized software brought a big benefit for businesses: computers could be linked together into networks to share information. At Xerox PARC in 1973, electrical engineer Bob Metcalfe (1946–) developed a new way of linking computers "through the ether" (empty space) that he called Ethernet -
MITS Altair 8800, built by Ed Roberts.
By 1974, Intel had launched a popular microprocessor known as the 8080 and computer hobbyists were soon building home computers around it. The first was the MITS Altair 8800, built by Ed Roberts. With its front panel covered in red LEDlights and toggle switches, it was a far cry from modern PCs and laptop -
Z3,
The Z3, an early computer built by German engineer Konrad Zuse working in complete isolation from developments elsewhere, uses 2,300 relays, performs floating point binary arithmetic, and has a 22-bit word lengt -
Grid Compass
.Designed in 1979 by a Briton, William Moggridge, for Grid Systems Corporation, the Grid Compass was one fifth the weight of any model equivalent in performance and was used by NASA on the space shuttle program in the early 1980's. -
apple phone
According to PC Magazine a touch screen is, "a display screen that is sensitive to the touch of a finger or stylus. Widely used on ATM machines, retail point-of-sale terminals, car navigation systems, medical monitors and industrial control panels, the touch screen became wildly popular on handhelds after Apple introduced the iPhone in 2007. -
"Napier's Bones. 17th century
.In the early 17th century, John Napier, a Scottish mathematician, invented another calculating tool. It used marked strips of wood or bone, side by side, to multiply and divide. This tool became known as "Napier's Bones." -
calculator estructure
.A calculator is a device that makes it quicker and easier for people to do sums—but it needs a human operator. A computer, on the other hand, is a machine that can operate automatically, without any human help, by following a series of stored instructions called a program -
Creeper”
4.The earliest computer viruses were pretty tame. In fact, the very earliest viruses -- like “Creeper” which just displayed the message “I’M A CREEPER : CATCH ME IF YOU CAN” -- were not only innocuous experiments in computing, but completely quarantined to their home network -
ROM
A ROM chip is used primarily in the start up process of a computer, whereas a RAM chip is used in the normal operations of a computer after starting up and loading the operating system -
RAM
.A RAM chip can store multiple gigabytes (GB) of data, up to 16 GB or more per chip; A ROM chip typically stores only several megabytes (MB) of data, up to 4 MB or more per chip. -
software
.Software can be defined as programmed instructions stored in the memory of stored-program digital computers for execution by the processor. The design for what would have been the first piece of software was written by Ada Lovelace in the 19th century but was never implemented -
hard disc
hard disk drive (HDD), hard disk, hard drive or fixed disk[b] is a data storage device used for storing and retrieving digital information using one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material
