Computer Terminology

in synchronous communication data will be transmitted with clock and in asynchronous only start and stop bit is required for transmission of data

but speed of the data transmission in synchronous is very high data rate

and in asynchronous speed is slow due to the start and stop bit

It is considered a machine because of the multiple occurrences of independent thinking and learning supplied by the CPU and or the multifunctinal uses of said equation.

A2

It could be argued, the other way around. A computer is a Device rather than a Machine.

A machine implies mechanical devices that move, like levers and gear mechanisms. A computer has no moving parts in itself, discounting the hard drive.

A device, is a generic term for something that can be used.

The role of system analyst : System analyst is the person who is responsible for the analysis of the system. He is the person who is responsible to deal with the customers and gather his requirements. He gathers the information about the key requirements of customer by asking questions, writing down the answers, organizing mock interview with the customers etc. He prepares the analysis model to achieve three primary objectives.

(1) To describe what the customer requires.

(2) To establish a basis for creation of software design.

(3) To define a set of requirements that can be validated once the software is built.

He collaborates a set of requirements that can be established during earlier requirement engineering tasks and build model that depict user scenarios, functional activities , problem classes and their relationships, system and classes behaviour and flow of data as it transformed. In early stages he focuses on what and not how.He decides what objects must system manipulate, what function must the system performs, what behaviour does the system exhibit, what interfaces are defined and what constraints to apply. If customer is precisely unsure of what he wants then analyzer decides to apply specific approach to accomplish function and performance.

The pure definition of a Systems Analyst is a programmer or consultant who designs and manages the development of business applications. Typically, systems analysts are more involved in design issues than in day-to-day coding. However, systems analyst is a somewhat arbitrary title, so different companies define the role differently.

Typical Position Description:

*Gather and analyze organizational data for developing information systems.

*Study existing business procedures and computer programs

to determine how both could be better organized and structured for the betterment of the organization.

*Study technological and business trends to be able to recommend changes to technology and business process to take advantage of advances in both.

*Design and guide the implementation of business computed-based information systems.

*Prepare and present reports to management as needed.

Typical Duties

1. Analyze existing business operations and existing information systems (computerized or not).

2. Study trends in technology.

3. Study trends in business and be aware of competitors' exploitation of technology.

4. Propose alternative solutions to business problems and select preferred solution. Justify selection.

5. Recommend technology products (hardware and software) for purchase.

6. Design new systems including process flow, user interface, reports, and security procedures.

7. Prepare training material for users of new system.

8. Supervise implementation of new system.

Most Desired Skills and Qualities

1. Excellent communication abilities (oral and written).

2. Problem solving.

3. Understanding of the potential of computer technology.

4. Appreciation for the business's objectives.

5. Ability to guide people through periods of change.

6. Patience. - should be #1

7. Creativity.

32000000 Bytes / 1024 = 31250 KBytes 31250 KBytes / 1024 = 30.5 MBytes

30.5 MBytes / 1024 = 0.02978515625 ... Gigabytes

There are 1000 terabytes (TB) in a petabyte (PB). There is an older definition based on multiples of 1024 instead of 1000, but this was changed, and tebibytes and pebibyte are the ones based on multiples of 1024.

Computer Manufactures consider it being 1000. But the OS will say 1024 (due to the binary numbering).

Here is the memory ladder according to computer manufactures

• 8 bits= 1 Byte
• 1000 bytes= 1 Kilobyte
• 1000 Kilobytes= 1 Megabyte
• 1000 Megabytes= 1 Gigabyte
• 1000 Gigabytes= 1 Terabyte
• 1000 Terabytes= 1 Petabyte
• 1000 Petabytes= 1 Exabyte
• 1000 Exabytes= 1 Zettabyte
• 1000 Zettabytes= 1 Yottabyte

Here it is according to binary prefix and the older numbering system:

• 8 bits= 1 Byte
• 1024 bytes= 1 Kilobyte
• 1024 Kilobytes= 1 Megabyte (1 048 576 bytes)
• 1024 Megabytes= 1 Gigabyte (1 073 741 824 bytes)
• 1024 Gigabytes= 1 Terabyte
• 1024 Terabytes= 1 Petabyte
• 1024 Petabytes= 1 Exabyte
• 1024 Exabytes= 1 Zettabyte
• 1024 Zettabytes= 1 Yottabyte

what exactly is the difference between electrical devices and electronic devices?

The answer lies in how devices manipulate electricity to do their work. Electrical devices take the energy of electric current and transform it in simple ways into some other form of energy - most likely light, heat, or motion. The heating elements in a toaster turn electrical energy into heat so you can burn your toast. And the motor in your vacuum cleaner turns electrical energy into motion that drives a pump that sucks the burnt toast crumbs out of your carpet.

In contrast, electronic devices do much more. Instead of just converting electrical energy into heat, light, or motion, electronic devices are designed to manipulate the electrical current itself to coax it into doing interesting and useful things.

That very first electronic device invented in 1883 by Thomas Edison manipulated the electric current passing through a light bulb in a way that let Edison create a device that could monitor the voltage being provided to an electrical circuit and automatically increase or decrease the voltage if it became too low or too high.

One of the most common things that electronic devices do is manipulate electric current in a way that adds meaningful information to the current. For example, audio electronic devices add sound information to an electric current so that you can listen to music or talk on a cellphone. And video devices add images to an electric current so you can watch great movies until you know every line by heart.

Keep in mind that the distinction between electric and electronic devices is a bit blurry. What used to be simple electrical devices now often include some electronic components in them. For example, your toaster may contain an electronic thermostat that attempts to keep the heat at just the right temperature to make perfect toast.

And even the most complicated electronic devices have simple electrical components in them. For example, although your TV set's remote control is a pretty complicated little electronic device, it contains batteries, which are simple electrical devices.

RESOURCE:

http://www.dummies.com/how-to/content/what-is-the-difference-between-electronic-and-elec.html, Doug Lowe. What is the difference between electronic and electrical devices?.08/17/2012