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The antique roadshow of computing. What do the following all have in common? – census taking – weaving (cloth) – multiplication – daughter of a famous

Mar 29, 2015



  • Slide 1

The antique roadshow of computing Slide 2 What do the following all have in common? census taking weaving (cloth) multiplication daughter of a famous 19th century poet Slide 3 ________________: The act of mathematical calculation ________________: The study of the principles and use of computing systems ________________: A programmable machine designed to carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed, allowing the computer to solve more than one kind of problem. Slide 4 Archaeologists found evidence of this from the 5th century B.C. in Greece. The earliest known written documentation of the Chinese abacus dates to the 2nd century BC Example: Upper level has one bead with two positions. The bead counts for 5 Lower level has four beads. The right-most column corresponds to ones, then tens, etc Slide 5 Blaise Pascal invented the mechanical calculator in 1642. Used to help reorganizing the tax revenues of the French province of Haute-Normandie. It could add and subtract directly and multiply and divide by repetition. Pascal went through 50 prototypes before presenting his first machine to the public in 1645. He built around twenty more machines during the next decade, often improving on his original design. Pascaline firsts: the first calculator to be used in an office (his father's to compute taxes) the first calculator commercialized (with around twenty machines built) the first calculator to be patented (royal privilege of 1649) the first calculator to have a controlled carry mechanism which allowed for an effective propagation of multiple carries. Slide 6 The Jacquard loom is a mechanical loom for manufacturing textiles with complex patterns. The Jacquard loom was the first machine to use punched cards to control a sequence of operations: 1805. The ability to change the pattern of the loom's weave by simply changing cards was an important precursor to the development of computer programming. Slide 7 Charles Babbage: 17911871 An English mathematician and mechanical engineer who originated the concept of a programmable computer. Babbage is credited with inventing the first mechanical computer that eventually led to more complex designs. He never actually completed construction, but the design was sound. Slide 8 Ada Lovelace: 1815-1852 A mathematician, created a program for the Analytical Engine to calculate numbers in the Bernoulli sequence. Lovelace is widely credited with being the first computer programmer Ada is a programming language named after her. Slide 9 Herman Hollerith 1860-1929 Invents a machine to assist in counting the U.S. Census 1890 census is completed in 3 months Hollerith creates the Tabulating Machine Company in 1896. This company becomes IBM in 1924 Slide 10 __________: not mechanical __________: not analog ______________: programs and data are essentially the same. Slide 11 Differential Analyzer Completed in 1942. ENIAC: Electronic Numeric Integrator and Computer Completed 1945. fills a room Uses 19,000 vacuum tubes and 1,000 relays Slide 12 A computing system is composed of hardware: the physical components of the system software: the instructions that control the hardware Hardware components include: Motherboard Central processing unit (CPU) Memory (RAM / Drives) IO Devices Video Card Sound Card Network Card 12 Slide 13 13 CPU Slide 14 14 Slot for CPU Slots for cards Slot for RAM Slide 15 Central Processing Unit An electronic chip that performs instructions The brains of a computing system A CPU can only perform very simple tasks: Can add/subtract/multiply/divide two numbers Can compare two numbers to see if one is smaller/larger Can copy/move data from one place to another CPUs appear more powerful than this since these tasks are done very quickly 15 Slide 16 16 Slide 17 17 Slide 18 18 Slide 19 All information needed for computing must be storable The instructions that a CPU must perform The data that the CPU requires as input The data that the CPU generates as output Computer storage (or memory) is used to remember these things 19 Slide 20 ICs (computer chips) are created by Robert Noyce & Jack Kilby in mid 60's Noyce founds Intel in 1970 Gordon Moore is the other Intel co-founder Moore is most widely known for a prediction he made that has been surprisingly correct. Moore's Law: computer hardware will double in complexity every 18 months.