Operating Systems

The Symbian OS is the leading mobile operating system in the "smart mobile device" market. Symbian OS runs exclusively on ARM processors and has evolved from Psion's EPOC which was developed as a rudimentary operating system for early electronic organizers.The main advantages of it is symbian OS is the latest OS,the old ones are this j2me which have the files format of JAR but in symbian OS we have SIS format,that means this is a third party software- anybody can develop softwares in this OS.and we also have fast browsing and a fast operating system.there are many advantages now in symbian OS as they also provide touchscreen phones such as UIQ phones.

Servers control a large number of computers, or "serve" a lot of people. Stand-alone is a "normal" computer.

is it possible to do multiprogramming with only one partition

An operation which when performed multiple times, has no further effect on

Its subject after the first time it is performed. - Nacolepsy

Palm OS is generally not considered a real-time operating system. True real-time operating systems are multi-tasking; the "real-time" refers to the ability to effectively manage resources to achieve a result in as little time as possible. Palm OS is single-tasking, so the speed at which it performs is mostly bottlenecked by the individual application running.

Windows CE is a real-time operating system; most uses of it are in multi-tasking devices.

Linux is not necessarily a real-time operating system, but can be configured that way, depending on the scheduler selected.

Apple's Macintosh computers use Apple's operating system known as OSX. The current version is OSX 10.8.#. Macintosh computers can also run the Windows and Linux operating systems, but those systems are not included in the purchase of the computer.

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Generally it's called "booting up" the system

DDL and data dictionary are two different things.

A data dictionary is a collection of unambiguous explanations about data elements. Normally, it is a centralized repository where everyone who needs information about the data being managed (for example, in a computer system) can refer to so they can understand what each data element is and how it is used.

For example, if you have a data element called "ADDRESS," some people might assume that this refers to the street address of a building while other people assume it refers to the IP address of a computer. The data dictionary will explain precisely what the data element called ADDRESS really means. The dictionary might also explain that data elements are made up of other data elements. For example, ADDRESS might be defined as the combination of NUMBER and STREET_NAME. Again, some people might think that NUMBER means the building number on the STREET_NAME, and others might think it means the apartment number, so data dictionaries must be very specific in defining all of the data elements.

Data dictionaries may be written documents expressed in a natural language (like English), or they may also be more formalized, using automated tools to help the organization capture, store and manipulate the information about their data elements. A DDL is a Data Definition Language. These are not natural languages. These are languages that can be understood by computer software (normally, a database management system) and they instruct the computer on what data structures it is to create and manage. A data structure usually involves tables, rows within the table, and then data elements within the rows. For example, you might purchase a database management system. When you first install it, the software has no idea what kind of data you want store and manage, so you have to teach it about what kind of structures you want it to create and what kind of data is going to be stored in those structures. You might, for example, tell if that you want each employee in your company to have a record with their social security number, their name, their home address and their telephone number. Then, you might want to have another record for each social security number that lists the employee's salary and what health insurance benefit they have selected. The way you tell your database management software that this is what you want is through the DDL. Once you have programmed it with the DDL, you can then use a DML (data manipulation language) to load the data into the structures, and use it. Again, a DML is a language that is understandable by the computer software. You may write a DML command that tells you the name of very person who lives on Main Street. You could also tell the database software to increase the annual salary of every employee by 15%.

The DDL tells the computer what data structures you want, and the DML tells the computer what you want to do with the data contained in those structures. The data dictionary tells everyone what all those data elements really mean.

When the operating system has to compromise between individual usability and resource utilization.

The operating system of a system is the "brain" of the system, just like you couldn't work with out a brain a computer could not run without an OS

It manages the transfer and storage of data as well as other vital computer functions like power management

These icons located on your desktop are shortcuts to programs. When you double tap them or right click and select "Open" it will launch the program assigned to that certain icon. You may be opening a Word Processing Program or even an Internet Browser. These icons are beneficial for opening tools used often quickly.

There are only mainly 3 OS's (Mac. Windows and Unix/Linux). All devices world wide use one of these three - unless someone 100% designed their own from scratch (which is not likely)

Any operating system that you can run on a desktop can run on a laptop as long as the hardware requirements are met. Installation procedure is similar to the one on a desktop. This applies to Windows, Linux and Mac

According to my Knowledge there are 3 most common operating systems they are
1) Symbian OS (WWW.SYMBIAN.COM)
2) Windows Mobile (Currently version 6.0)
3) Palm OS
Nearly all the high end Nokia and Sony Ericsson mobiles run on Symbian OS.(Smartphones and PDA's)
All the other normal phones or non-smartphones have a proprietary operating system i.e. built within the mobile companies or bought from third parties.

In order to delete the Windows XP virtual machine that you created simply right click the virtual machine that you wish to delete, select "Remove" in the menu that appears, then select "Delete all files". After that, if you wish to delete your .ISO file, move it to the recycle bin and then empty the recycle bin.

Linux and Sun Micro

you enter a code (typing) which sends a message to the "iner workings" of the computer then that message get sent to a silacon panel which then puts the code on your screen which all happens at a lighting fast speed

To simplify and make development more efficient. The more people who can study the project the more likely it is that problems will be found and solved. Also look up the so called bazaar development methodology.

Mac OS X

Windows 7

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