Recall: Computers communicate using binary Therefore, computers do NOT process information using characters (e.g. letters). Each letter or character has a number representation that the computer uses to refer to the character. ASCII: American Standard Code for Information Interchange ASCII is a code for representing English characters as numbers. The ASCII numbers range from 0…
The Internet Large sprawling network on a global scale. A very large sprawling Wide Area Network A network of many networks A little History… 1960’s Advance Researh Projects Agency (ARPAnet) is a system of linked mainframes Developed by military to ensure communication in times of crisis 1980’s MILNET splits from ARPAnet to form the Internet…
Definition In a network, a communication channel is a physical path the transmission signals travel. It is the path information travels from computer to computer. How do the computers in a network “connect” to each other. The 5 communication channels twisted-pair cables coaxial cables fiber optic cables terrestrial stations communication satellites Twisted pair cables Signals…
Definition A computer network is a number of computers linked together to enable them to share computing resources. Networks can be permanent (via cables) or temporary (via modem) The sharing of resources through a network can also be local or global Networks allow different types of computers to communicate. Benefits Information can be accessed in…
Software is the programs, routines, and symbolic languages that control the functioning of the hardware and direct its operation. Types of Software Retail Software type of software is sold off the shelves of retail stores. includes expensive marketing and packaging designed to catch the eye of shoppers generally more expensive OEM Original Equipment Manufacturer designed…
Motherboard The motherboard is the main circuit board of a computer. EVERYTHING in a computer system is connected to it!!! Produced in a variety of sizes (a.k.a. form factor) Components The following are components that are typically connected to a motherboard CPU Hard Drive Optical Drive (DVD, CD, etc)þ RAM Video Card Power supply A…
Hardware vs. Software Hardware is the physical equipment directly involved in the performance of data-processing or communications functions. Software is the programs, routines, and symbolic languages that control the functioning of the hardware and direct its operation. Definition of a computer A computer is a programmable machine that stores, retrieves, and processes information A Personal…
When installing or removing computer hardware and other peripherals : 1. Wear proper apparel. Avoid acrylic or wool sweaters when working with electronic parts. Do not wear loose-fitting clothing, rings, bracelets etc. 2. Unplug all computer equipment and peripherals before opening any cases. (The only exception to this is if you were working without an…
First Generation Computers 1951 – 1959 • Vacuum tube logic. • Magnetic drum or tape storage. • Punched cards used for data inputs. • Programmed in machine language. • Large, slow and expensive. Second Generation Computers 1959 – 1963 • Discrete transistors replace vacuum tubes. • Magnetic core used for main memory. • Magnetic disk…
Understanding Electricity Everything inside or attached to the PC system unit runs on electricity. Electricity is both the lifeblood and the mysterious evil of the personal computer. It’s a flowing entity, measured in amps, ohms, and volts that should be approached with respect, if not outright fear. Electricity flowing through a circuit is very much…
Don’t stress – be prepared! Before the Interview Learn as much as possible about the job you are interviewing for. See if the company has a website – a great source of information Think of three questions you may want to ask the interviewer about the job Do a self-inventory of your personal strengths and…
Hitler’s belief: after Norway, Denmark, Poland, Luxembourg, Belgium, Holland and France fell into German hands, Britain would only naturally be so scared after being thrown out of Europe that it would beg for surrender. Two options: Limited military action, propaganda and political warfare An actual invasion July 10, 1940: Operation Sea lion – an invasion…
Daily life in the trenches Schlieffen Plan: Germany quickly advanced through Belgium and into Northeast France and began push for Parisian assault Battle of the Marne – French, Belgian and British troops fight the Germans and push them back to Aisne. It was a clear Allied victory, with gained ground though heavy casualties Importance: Loosing…
Each of the two twentieth century world wars had brought with it domestic tension related to the issue of conscription. There had been passionate opposition to conscription in Quebec in 1917 and again in 1944. After 1945 Quebec-Canada relations appeared to be relatively calm but problems remained very close to the surface. The Problems of…
For Canadians, the late forties and early fifties marked the return to a normal family life Several hundred thousand Canadian veterans returned home after serving in the war effort overseas Some soldiers returned home to their families – others brought home their war brides and their children 93% were British, 7% were from Italy, Belgium,…
The Cold War Intensifies (327) August 29th, 1949: Soviet Union detonates an atomic bomb at a test site in Siberia Military balance shifts: both sides in the Cold War have nuclear weapons This triggers an arms race to develop more powerful thermonuclear weapons (hydrogen bombs) 1952: United States detonates world’s first hydrogen bomb 1953: Soviets…
Country of Economic Contrasts 1st millionaires appear Cities have slums Stark contrast between the rich and the poor (upper and lower class) 1/4 + of babies die before their 1st birthday New technology makes life easier (for those who can afford the luxury) Technology in the Home 1900s was a time of “gadgets” New “gadgets…
Queen Elizabeth was born on September 7th 1533 at Greenwich Palace. She was the daughter of Anne Boleyn who was the second wife of King Henry VIII. The king hoped for a son after having a daughter. Queen Elizabeth’s mom was arrested, charged with a many crimes, and executed on 19 May 1536. Just 12…
Religion The major two religions in Elizabethan England were Catholic and Protestant religions, Choosing the “wrong” religion brought risks to personal wealth, freedom, and life Schools taught these “favored” religions; if you did not practices these religions then it would lead to great danger: Imprisonment, Torture. Execution Catholics believed that the pope or the priest…
William Shakespeare was born on April 23rd, 1564 and died on April 25th, 1616. Both of his parents were uneducated. When W.Shakespeare was four years of age, he went to a private school for both boys and girls. He was educated in Latin and Greek. His school days often started from dawn till dusk. W.…