Extensions = .--- = Counterpart
+ impress = .sdd = MS Powerpoint
+ base = .sdb
+ app. document = .sdw = MS Word
+ master document = .sgl = MS Word
+ math = .smf
+ calc = .sdc = MS Excel
+ draw = .sda = MS Office
Sabado, Agosto 27, 2011
Sabado, Agosto 6, 2011
Lesson 3:PC Care and Safety Procedures for Users
1.How to take care of your PC
a.Computers need a good working working temperature to work properly.They need to be placed in a cool dry place.You can maintain good temperature with an electric fan or air conditioning.
b.All the cables and connectors must be tied together to keep them away from walkways to avoid accidents.
c.Avoid eating in front of a computer.Food bits attract insects like ants that can penetrate the hardware and cause malfunction.Spilled drinks,on the other hand,causes short circuits.
d.Always use an AVR (automatic voltage regulator) to regulate electricity.Too much electric voltage cause the unit to short.Also,turn off computers during lightning as these can cause electric surges to the computer.
e.Do not bump or drop the computer peripherals or components as any damage may cause them to malfunction.
f.Avoid clutter around your PC.Use soft cloth in cleaning your computer to avoid scratches.
g.Always scan for computer viruses.Internet connection and external storage devices often carry viruses that could harm your files and cause software malfunctions.
2.Good working habits
a.Tap on keys and mouse buttons gently.
b.Avoid long,uninterrupted periods of typing.You may take short breaks every 20 minutes.
c.Avoid staring at the monitor too long.Take vision breaks (stare at something green,etc.) and do eye exercises.
3.Proper workstation design
a.Position in a well-ventilated,comfortable room.
b.Use an adjustable workstation and an ergonomic computer chair.
c.Place the monitor 16 to 24 inches away,at eye level or slightly at a lower angle.Tilt the monitor or adjust the light source.Adjust the brightness and contrast settings.
d.Use extendable/retractable legs of the keyboard.
e.Place mouse where it is easily accessible by your dominant hand.
f.Use a document holder to minimize vertical head movements.
4.Proper posture
a.Sit up straight and put the feet flat on the floor.Use a footrest if needed.
b.Position your lower arms parallel withe floor and level to your keyboard,with elbows at your side.
c.Keeps wrists straight.
d.Do not lean into the monitor,but sit close enough to the keyboard and the mouse to stay relaxed.
a.Computers need a good working working temperature to work properly.They need to be placed in a cool dry place.You can maintain good temperature with an electric fan or air conditioning.
b.All the cables and connectors must be tied together to keep them away from walkways to avoid accidents.
c.Avoid eating in front of a computer.Food bits attract insects like ants that can penetrate the hardware and cause malfunction.Spilled drinks,on the other hand,causes short circuits.
d.Always use an AVR (automatic voltage regulator) to regulate electricity.Too much electric voltage cause the unit to short.Also,turn off computers during lightning as these can cause electric surges to the computer.
e.Do not bump or drop the computer peripherals or components as any damage may cause them to malfunction.
f.Avoid clutter around your PC.Use soft cloth in cleaning your computer to avoid scratches.
g.Always scan for computer viruses.Internet connection and external storage devices often carry viruses that could harm your files and cause software malfunctions.
2.Good working habits
a.Tap on keys and mouse buttons gently.
b.Avoid long,uninterrupted periods of typing.You may take short breaks every 20 minutes.
c.Avoid staring at the monitor too long.Take vision breaks (stare at something green,etc.) and do eye exercises.
3.Proper workstation design
a.Position in a well-ventilated,comfortable room.
b.Use an adjustable workstation and an ergonomic computer chair.
c.Place the monitor 16 to 24 inches away,at eye level or slightly at a lower angle.Tilt the monitor or adjust the light source.Adjust the brightness and contrast settings.
d.Use extendable/retractable legs of the keyboard.
e.Place mouse where it is easily accessible by your dominant hand.
f.Use a document holder to minimize vertical head movements.
4.Proper posture
a.Sit up straight and put the feet flat on the floor.Use a footrest if needed.
b.Position your lower arms parallel withe floor and level to your keyboard,with elbows at your side.
c.Keeps wrists straight.
d.Do not lean into the monitor,but sit close enough to the keyboard and the mouse to stay relaxed.
Lunes, Hulyo 25, 2011
Types of Computers
PC: Abbreviation for "Personal Computer," 93% of the computer population uses PCs. PCs for personal use come in almost any shape and design, they usually run Microsoft Windows (for example, Windows XP, Vista, or Windows 7), are exceptionally fast, and are compatible with almost all available computer applications. Most large-scale businesses, corporations, schools, and home users operate PCs due to their customizable features, performance, and generally low price. Leading PC manufacturers include Dell, HP, Samsung, Sony, Toshiba, and many others.
===
It should be mentioned that when people refer to a PC in general conversation, they are (almost always) referring to a Microsoft Windows compatible personal computer. These computers are not limited to running the Windows family of operating systems, but their architecture is compatible with the requirements of claiming compatibility. Historically, these would have been explained as "IBM PC" or "IBM Clone" computers.
PC's in general can function as servers or workstations, depending on their implementation. These may be graded, or configured as:
Personal use - Most commonly thought of as a "PC"
Business Class Workstation - the "PC" qualification starts getting a little grey here.
Business Class Server - no longer considered a "PC"
Laptop: A compact, battery powered version of a PC. Also called a "Notebook."
Macs: Even though the Mac (short for "Macintosh") is a form of personal computer, it is different from a PC because it does not use Microsoft Windows as the Operating System. Instead, it uses the Mac OS series, such as OS X Leopard.
Macs are known for their incredible system stability, quality designs, unique programs and features, and their usually fast speed. Macs are becoming more popular in society, generally used in peoples' homes or in digital graphic design studios. Unfortunately, many people do not invest their money in a Mac because of a Mac's steep price (a $1500 Dell PC is about the same price of a $2400 Apple Macktintosh--both with the same specifications) and the lack of many compatible programs made specifically for Macs (although the number is increasing).
Mainframe : Computers with large Hard Drives, lots of Memory (RAM), multiple CPUs running together, which perform large amounts of computing depending upon the speed of the processors used and amount of RAM included.
Micro Computer : A very small computer, usually used in cameras.
Super Computer : A computer with lots of processors, Memory (RAM), etc. Usually used in scientific research work or they are used by the government. For large manufacturers, a supercomputer typically "breaks down" problems, solves them in small "bits," and then puts the problem "back together." They have a capability of 14,000 micro computers.
PDA: "Personal Digital Assistant" or Palmtop.
Analog : Older, out-dated computers. They calculate physical Quantities such as voltage, etc...
Digital: Computers which use binary digits (zeros and ones) for processing. Almost all electronic computing devices are digital, including PCs, Macs, and Servers.
Server: A computer with great processing power that receives and performs requests from other computers.
What the above answers are stating are names/applications/types of electronic computers. Electronic computers can be subdivided into analog or digital. At a basic level, all digital electronic computers are composed of several parts - including input/output (LCDs, LEDs, keypads, printers, etc.), a processor (often includes an arithmetic logic unit, controller, registers, etc., but doesn't necessarily need to contain all of these), and memory. Analog computers were the predecessors of these digital computers, and are still used in some applications today.
A "computer" is simply something used for performing calculations. A "long" time ago (World War 2), Computer was a title/job description, literally meaning someone who did computations. This definition would also stretch computer to cover mechanical devices, such as the enigma machines used in WW2 for ciphers (by the Germans).
===
It should be mentioned that when people refer to a PC in general conversation, they are (almost always) referring to a Microsoft Windows compatible personal computer. These computers are not limited to running the Windows family of operating systems, but their architecture is compatible with the requirements of claiming compatibility. Historically, these would have been explained as "IBM PC" or "IBM Clone" computers.
PC's in general can function as servers or workstations, depending on their implementation. These may be graded, or configured as:
Personal use - Most commonly thought of as a "PC"
Business Class Workstation - the "PC" qualification starts getting a little grey here.
Business Class Server - no longer considered a "PC"
Laptop: A compact, battery powered version of a PC. Also called a "Notebook."
Macs: Even though the Mac (short for "Macintosh") is a form of personal computer, it is different from a PC because it does not use Microsoft Windows as the Operating System. Instead, it uses the Mac OS series, such as OS X Leopard.
Macs are known for their incredible system stability, quality designs, unique programs and features, and their usually fast speed. Macs are becoming more popular in society, generally used in peoples' homes or in digital graphic design studios. Unfortunately, many people do not invest their money in a Mac because of a Mac's steep price (a $1500 Dell PC is about the same price of a $2400 Apple Macktintosh--both with the same specifications) and the lack of many compatible programs made specifically for Macs (although the number is increasing).
Mainframe : Computers with large Hard Drives, lots of Memory (RAM), multiple CPUs running together, which perform large amounts of computing depending upon the speed of the processors used and amount of RAM included.
Micro Computer : A very small computer, usually used in cameras.
Super Computer : A computer with lots of processors, Memory (RAM), etc. Usually used in scientific research work or they are used by the government. For large manufacturers, a supercomputer typically "breaks down" problems, solves them in small "bits," and then puts the problem "back together." They have a capability of 14,000 micro computers.
PDA: "Personal Digital Assistant" or Palmtop.
Analog : Older, out-dated computers. They calculate physical Quantities such as voltage, etc...
Digital: Computers which use binary digits (zeros and ones) for processing. Almost all electronic computing devices are digital, including PCs, Macs, and Servers.
Server: A computer with great processing power that receives and performs requests from other computers.
What the above answers are stating are names/applications/types of electronic computers. Electronic computers can be subdivided into analog or digital. At a basic level, all digital electronic computers are composed of several parts - including input/output (LCDs, LEDs, keypads, printers, etc.), a processor (often includes an arithmetic logic unit, controller, registers, etc., but doesn't necessarily need to contain all of these), and memory. Analog computers were the predecessors of these digital computers, and are still used in some applications today.
A "computer" is simply something used for performing calculations. A "long" time ago (World War 2), Computer was a title/job description, literally meaning someone who did computations. This definition would also stretch computer to cover mechanical devices, such as the enigma machines used in WW2 for ciphers (by the Germans).
Sabado, Hulyo 23, 2011
Did you know?
1.The Milky Way is a vast spiral containing over 100 billion stars.
2.A light-year is the distance light travels in a year~~~almost 6 trillion miles [10 trillion km],and the Milky Way is 100,000 light-years across.
3.After the first millisecond of the Big Bang,the expanding universe was 50 million times denser than lead,and 30 million times hotter than the Sun.
4.The brightest star that can be seen on Earth,the "Dog Star" Sirius,gives off 30 times more light than the Sun.
5.When a comet struck Siberia in 1908,a 37-mile [60 km] area of forest was flattened and the shockwaves were felt in London,England.
6.If the ice at the polar caps melted,the oceans would rise by nearly 330 feet [100 m].
7.The seas on Earth contain 60,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 water molecules!
8.The most powerful earthquake ever recorded measured 9.5 on the Richter Scale,and it struck Chile on May 22,1960.
9.A type of sandstone called itacolumite can be bent by hand.
10.The densest planet in the Solar System is the Earth,because of the dense rocks found on the planet.
11.The lightest planet in the Solar System is Saturn.If it was the same size as a tennis ball,it would float on the surface of water.
12.If an atom was the size of a strawberry and you put it down on the ground,it would dig a hole right into the middle of the Earth.
13.If a nucleus was the same size as a coin,the whole atom would be an olympic stadium.
14.A cheetah has an acceleration of 0 to 50 mph [0 to 80 kph] in 2 seconds.
15.An elephant pregnancy lasts for 22 months.
16.Remains of prehistoric dragonflies were shown to have a wingspan of 32 inches [60 cm].
17.The largest dinosaur known is Seismosaurus.It reached a height of 118 feet [36 m] and a weight of 80 tons.
18.The smallest dinosaur known is Microraptor,not Compsognathus.The Microraptor reached a full length of 60 cm,while a Compsognathus was 90 cm.
19.The teeth of a Tyrannosarus had a length of 6 inches [15 cm]~~~almost the size of a banana.
20.The largest creature ever to have existed,the Blue Whale,weighed more than 20 elephants,and its heart is the same size as a small car,and it beats only 8 times per minute.
21.The smallest bird,the bee hummingbird,is smaller than a regular dragonfly and weighs less than an ounce.
22.An albatross has a wingspan as wide as an elephant is tall.
23.A group of hawks is called a cast,a group of starlings is called a murmuration,and a group of nightingales is called a watch.
24.When the Peregrine falcon dives,it reaches incredible speeds over 186 mph [300 kph].
25.A butterfly's wings are covered with tiny scales.
26.Monarch butterflies migrate over 1,864 miles [3,000 km] from Canada to Mexico.
27.A snake charmer's music cannot be heard by the snake!
28.Snakes have an average of 400 vertebrae in its body.
29.Bats are the only mammals that can truly fly.
30.The liver of a polar bear is poisonous.
31.44 of the 70 animal found below the Antarctic circle are insects.
32.One thread of spider silk is twice as strong as steel,but 250 times finer than human hair.
33.An ant can carry 50 times its own weight.
34.If a human had the jumping powers of a grasshopper,he can leap one-third the length of a soccer pitch.If he had the jumping powers of a flea,he can jump over the St. Paul Cathedral.
35.An average swarm of locusts can be so huge it can block out the Sun!
36.When a rabbit becomes pregnant,so do the fleas on its skin.
37.If a species of beetle called tiger beetle were the size of a horse,it would run at a speed of 250 mph [400 kph].
38.An earthworm is hermaphrodite~~~which means it's both male and female.
39.There are over 100 billion cells in the human body.
40.One drop of blood contains 5 million red blood cells,but only 15,000 white blood cells.
41.The blood vessels in one human body would encircle the world by the equator twice if laid end to end.
42.One-fifth of the world's population lives in China.
43.A black hole has gravity strong enough to suck in anything,even light.
44.The largest star known today is the VY Canis Majoris.Its diameter is 3,000 times that of the Sun.
45.Lightning is sometimes hotter than the Sun.
46.You cannot hum if you plug your nose with your thumbs.
47.To measure the distance of a storm from you,start counting after you see lightning,then stop after you hear thunder.For every 3 seconds you counted,the storm is 1 mile away.
48.An owl can rotate its head up to 180 degrees~~~which means it can see what is behind it without moving its whole body!
49.A Blue Whale's cry is measured 180 decibels loud.A human ear is harmed when it hears a sound of 140 decibels.
50.A coin falling from top of a skyscraper can critically injure a person,but it won't be fatal.
2.A light-year is the distance light travels in a year~~~almost 6 trillion miles [10 trillion km],and the Milky Way is 100,000 light-years across.
3.After the first millisecond of the Big Bang,the expanding universe was 50 million times denser than lead,and 30 million times hotter than the Sun.
4.The brightest star that can be seen on Earth,the "Dog Star" Sirius,gives off 30 times more light than the Sun.
5.When a comet struck Siberia in 1908,a 37-mile [60 km] area of forest was flattened and the shockwaves were felt in London,England.
6.If the ice at the polar caps melted,the oceans would rise by nearly 330 feet [100 m].
7.The seas on Earth contain 60,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 water molecules!
8.The most powerful earthquake ever recorded measured 9.5 on the Richter Scale,and it struck Chile on May 22,1960.
9.A type of sandstone called itacolumite can be bent by hand.
10.The densest planet in the Solar System is the Earth,because of the dense rocks found on the planet.
11.The lightest planet in the Solar System is Saturn.If it was the same size as a tennis ball,it would float on the surface of water.
12.If an atom was the size of a strawberry and you put it down on the ground,it would dig a hole right into the middle of the Earth.
13.If a nucleus was the same size as a coin,the whole atom would be an olympic stadium.
14.A cheetah has an acceleration of 0 to 50 mph [0 to 80 kph] in 2 seconds.
15.An elephant pregnancy lasts for 22 months.
16.Remains of prehistoric dragonflies were shown to have a wingspan of 32 inches [60 cm].
17.The largest dinosaur known is Seismosaurus.It reached a height of 118 feet [36 m] and a weight of 80 tons.
18.The smallest dinosaur known is Microraptor,not Compsognathus.The Microraptor reached a full length of 60 cm,while a Compsognathus was 90 cm.
19.The teeth of a Tyrannosarus had a length of 6 inches [15 cm]~~~almost the size of a banana.
20.The largest creature ever to have existed,the Blue Whale,weighed more than 20 elephants,and its heart is the same size as a small car,and it beats only 8 times per minute.
21.The smallest bird,the bee hummingbird,is smaller than a regular dragonfly and weighs less than an ounce.
22.An albatross has a wingspan as wide as an elephant is tall.
23.A group of hawks is called a cast,a group of starlings is called a murmuration,and a group of nightingales is called a watch.
24.When the Peregrine falcon dives,it reaches incredible speeds over 186 mph [300 kph].
25.A butterfly's wings are covered with tiny scales.
26.Monarch butterflies migrate over 1,864 miles [3,000 km] from Canada to Mexico.
27.A snake charmer's music cannot be heard by the snake!
28.Snakes have an average of 400 vertebrae in its body.
29.Bats are the only mammals that can truly fly.
30.The liver of a polar bear is poisonous.
31.44 of the 70 animal found below the Antarctic circle are insects.
32.One thread of spider silk is twice as strong as steel,but 250 times finer than human hair.
33.An ant can carry 50 times its own weight.
34.If a human had the jumping powers of a grasshopper,he can leap one-third the length of a soccer pitch.If he had the jumping powers of a flea,he can jump over the St. Paul Cathedral.
35.An average swarm of locusts can be so huge it can block out the Sun!
36.When a rabbit becomes pregnant,so do the fleas on its skin.
37.If a species of beetle called tiger beetle were the size of a horse,it would run at a speed of 250 mph [400 kph].
38.An earthworm is hermaphrodite~~~which means it's both male and female.
39.There are over 100 billion cells in the human body.
40.One drop of blood contains 5 million red blood cells,but only 15,000 white blood cells.
41.The blood vessels in one human body would encircle the world by the equator twice if laid end to end.
42.One-fifth of the world's population lives in China.
43.A black hole has gravity strong enough to suck in anything,even light.
44.The largest star known today is the VY Canis Majoris.Its diameter is 3,000 times that of the Sun.
45.Lightning is sometimes hotter than the Sun.
46.You cannot hum if you plug your nose with your thumbs.
47.To measure the distance of a storm from you,start counting after you see lightning,then stop after you hear thunder.For every 3 seconds you counted,the storm is 1 mile away.
48.An owl can rotate its head up to 180 degrees~~~which means it can see what is behind it without moving its whole body!
49.A Blue Whale's cry is measured 180 decibels loud.A human ear is harmed when it hears a sound of 140 decibels.
50.A coin falling from top of a skyscraper can critically injure a person,but it won't be fatal.
Miyerkules, Hulyo 20, 2011
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