No! not that kind of RAM! R-A-M Random access memory.

No! not that kind of RAM!R-A-M

Random access memory

RAM is a fast, temporary type of memory in which

programs, applications and data are stored.

RAM

It is where information to run the programmes that are being used currently my the proccessor, is held. It is a tempory type of memory which means it clears when you lose power or shut down the computer.This is known as volatile memory

RAM

It is where information to run the programmes that are being used currently my the proccessor, is held. It is a tempory type of memory which means it clears when you lose power or shut down the computer.This is known as volatile memory

This is why when you “accidently” turned my computer off yesterday, my work was lost forever!

I hadn’t saved my work so it was held in RAM, deleting it when you flipped the switch!

RAM

It is where information to run the programmes that are being used currently my the proccessor, is held. It is a tempory type of memory which means it clears when you lose power or shut down the computer.This is known as volatile memory

Sorry about that……

Advantages and Disadvantages

An advantage of RAM is that the more RAM you have, the faster your computer can multitask or work when completing tasks such as streaming videos and running multiple applications eg. Different types of softwareA Disadvantage is that it is volatile, information can be lost when it isn't saved.

Advantages and Disadvantages

An advantage of RAM is that the more RAM you have, the faster your computer can multitask or work when completing tasks such as streaming videos and running multiple applications eg. Different types of softwareA Disadvantage is that it is volatile, information can be lost when it isn't saved.

THAT’S WHY I DIDN’T GET MY WORK BACK!!!!!!

Advantages and Disadvantages

An advantage of RAM is that the more RAM you have, the faster your computer can multitask or work when completing tasks such as streaming videos and running multiple applications eg. Different types of softwareA Disadvantage is that it is volatile, information can be lost when it isn't saved.

……

Examples of How it is Used

In hospitals, if a computer is running multiple applications at the same time for the doctor to use, such as a patient database, a video of an operation and other software, the computer would need lots of RAM to use to run all these programmes quickly and efficiently.

Read only Memory

ROM

WHAT IS ROM?• ROM stands for Read only Memory.

• ROM is computer memory on which data has been pre-recorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read.

• Unlike main memory (RAM), ROM retains its contents even when the computer is turned off. ROM is referred to as being non-volatile, whereas RAM is volatile.

• Volatile (vol•a•tile)- not retaining data when electrical power is turned off/ all data is kept when powered off.

• Non- Volatile- All information is stored and is unchanged even powered off.

• The operating system uses ROM so that the start up of a computer is the same each time it is turned on. This cannot be changed.

• Most personal computers contain a small amount of ROM that stores critical programs such as the program that boots the computer. In addition, ROMs are used extensively in calculators and peripheral devices such as laser printers, whose fonts are often stored in ROMs.

HOW IT IS USED• Start Up for computer

• Washing Machines

• Dishwashers

• Microwaves

• Televisions- Used in hospitals as entertainment for patients.

• Vending Machines- This is used in hospitals so people in hospitals can have a pick me up.

• Ticket Machines- This is used in hospital car parks.

• Electronic hospital beds- Used to alter position of bed for comfort of patient.

• Back up generators- Used in hospitals to sense whether power has been cut.

• Heart monitors

• MRI scans

• Electronic Scales used to measure people’s weight in hospitals.

• Wristwatch

ADVANTAGES AND DISADVANTAGES• An advantage of ROM is once it is "written" to, it will be there forever. Roms are often

used in fixed situations like the chip that runs a dishwasher, an inexpensive wristwatch, etc. Also, it does not require constant source of electricity.

• A disadvantage of ROM is that it has limited use, for example if you wanted more functions on your washing machine, you’d have to buy a new washing machine because a ROM is unchangeable.

DATA AND INFORMATION

Data is processed by computers and converted into information.

Data can be words, numbers, dates, images, sounds or anything without context.

DATA!

42 Rabbits £40

Apples 13/06/2010 16:00

BYTES & DATA.Bit each individual 1 or 0 is called a bit – short for binary digit.

Byte 8 bits is called a byte.

Kilobyte 1 kilobyte (1KB or simply 1K) is about a thousand bytes.

Megabyte 1 megabyte (1MB) is about a million bytes.

Gigabyte 1 gigabyte (1GB) is about a thousand million bytes. To be exact, 1 GB = 230 = 1073 741 824 Bytes. Terabyte 1 terabyte (1TB) is about 1,000,000,000,000 bytes.

DATA!

Data is measured in bytes

Binary is a form of data which uses 0s and 1s to represent numbers and letters.

For example, a lower case a written as 01100001 in binary.

Computers use binary as it is more direct and requires minimal translation.

BINARY!

COLLECTING DATA…

Input devices can collect data automatically, for example a barcode reader at a till.

The data collected will be read into a database for processing.

Spreadsheets are commonly used to turn data into information.

Information is a collection of words, numbers, dates, images, sounds etc. put into context, i.e. to give them meaning.

INFORMATION!

There are 42 apples in a box The price of a ticket is £40 The journey takes 76 minutes

CHANGING DATA INTO

INFORMATION…

Mr Anderson Yes -Mrs Williams Yes -Miss Davis Yes -Mr Walsh Yes -

Miss Ainsworth No YesMrs Clarke No No

Structure is needed for data to become information. In the table below the columns contain either 'Yes' or

'No' but without headings there is no meaning.

CHANGING DATA INTO

INFORMATION…

By adding headings, the data becomes information.

Patient Present Absence authorised

Mr Anderson Yes -Mrs Williams Yes -Miss Davis Yes -Mr Walsh Yes -

Miss Ainsworth No YesMrs Clarke No No

DATA

INFORMATION

KNOWLEDGE