well, They use two different clocking technologies that are not compatible within a system. Now, if you are looking at the same type of memory as what is already in the system, then you can buy memory that is faster than the existing memory. Of course, there are always restrictions.

In order for this to work, the memory modules must be of a density that is supported by the computer motherboard. For example, a system that can support 1GB modules cannot use a faster 2GB memory module as the system will not recognize it. Similarly, if your motherboard won't support memory with ECC, it won't support faster modules if they have this feature.

The other issue has to do with the speed. Even though they may be faster modules, they will not be running at the faster speed. This can happen in two cases. The first is that the motherboard or processor will not support the faster memory speed. When this happens, the modules will instead be clocked at the fastest speed that they can support. If the modules are installed with some slower ones already installed, the memory system will run at the slowest memory timings and speed.

So, why would you want to install faster memory in a system if it will still run at the slower speed? It has to do with availability and pricing. Often times as memory technology ages, slower modules may drop out of production leaving only faster ones available. Such might be the case with a system that supports PC2700 DDR memory but all you can find is PC3200 DDR modules. Memory is considered a commodity and as a result has variable pricing. This can result in situations where a faster memory module might be less expensive than a slower one. If PC2-5400 DDR2 supplies are tight, it might be less expensive to buy a PC2-6400 DDR2 module instead.

If you are intending to use a faster memory module in your computer, here is a summary of the items to consider before purchasing and installing it:

1. The memory has to be of the same technology (DDR, DDR2 and DDR3 are not cross compatible)
2. The PC must support the memory module densities being considered
3. No unsupported features like ECC must be present on the module
4. The memory will only be as fast as that supported by the memory or as slow as the slowest installed memory module
source site: http://compreviews.about.com/od/mem ory/f/FasterRAM.htm

Answered by Nidhi Singh , an ibibo Master, at 10:57 AM on September 29, 2008

The GPL is the Free Software Foundation's General Public Licence. The GPL is considered the standard open source software licence, and many non-software works are published under the GPL as well. The purpose of this license is to ensure that a work can be freely distributed and modified by anybody, and that no proprietary works can be derived from the original work. Past versions of the GPL have been quite liberal in what they allow an end user or developer to do with software, but have been vague in some definitions. The third version of the license, currently under development, aims to more clearly define and restrict developments such as DRM. This has led to much controversy, and traditional supporters and advocates of the GPL are currently split as to its continued value.

Most people know that GPL software is free software, but, outside of that, eyes generally glaze over when they start looking at the full GPL, and with good reason! The latest version of the GPL licence, GPLv3, is a LONG, very "legal" document, which can only truly be understood by some top lawyer.

Some conditions of GPL :
* Anybody can use the software for any purpose, commercial or non-commercial.
* Anybody can modify the software in any desired way for private use, without redistributing any code. This means you are able to use and customize the software to run any web site, commercial or non-commercial, with no requirement to contribute your modifications back to the software user community. Naturally, such contributions are welcome, but by no means required.
* Anybody can redistribute the software, in its original form or modified, as long as the distributed product comes with full source code and is also licensed under the GPL.

For more visit :

http://what-is-what.com/w hat_is/gpl.html

Answered by Ashish Yadav , an ibibo Wizard, at 5:09 PM on September 18, 2008

This Academic Free License (the "License") applies to any original work of authorship (the "Original Work") whose owner (the "Licensor") has placed the following licensing notice adjacent to the copyright notice for the Original Work:

Licensed under the Academic Free License version 3.0

1) Grant of Copyright License. Licensor grants You a worldwide, royalty-free, non-exclusive, sublicensable license, for the duration of the copyright, to do the following:

a) to reproduce the Original Work in copies, either alone or as part of a collective work;

b) to translate, adapt, alter, transform, modify, or arrange the Original Work, thereby creating derivative works ("Derivative Works") based upon the Original Work;

c) to distribute or communicate copies of the Original Work and Derivative Works to the public, under any license of your choice that does not contradict the terms and conditions, including Licensor's reserved rights and remedies, in this Academic Free License;

d) to perform the Original Work publicly; and

e) to display the Original Work publicly.

2) Grant of Patent License. Licensor grants You a worldwide, royalty-free, non-exclusive, sublicensable license, under patent claims owned or controlled by the Licensor that are embodied in the Original Work as furnished by the Licensor, for the duration of the patents, to make, use, sell, offer for sale, have made, and import the Original Work and Derivative Works.

3) Grant of Source Code License. The term "Source Code" means the preferred form of the Original Work for making modifications to it and all available documentation describing how to modify the Original Work. Licensor agrees to provide a machine-readable copy of the Source Code of the Original Work along with each copy of the Original Work that Licensor distributes. Licensor reserves the right to satisfy this obligation by placing a machine-readable copy of the Source Code in an information repository reasonably calculated to permit inexpensive and convenient access by You for as long as Licensor continues to distribute the Original Work.

4) Exclusions From License Grant. Neither the names of Licensor, nor the names of any contributors to the Original Work, nor any of their trademarks or service marks, may be used to endorse or promote products derived from this Original Work without express prior permission of the Licensor. Except as expressly stated herein, nothing in this License grants any license to Licensor's trademarks, copyrights, patents, trade secrets or any other intellectual property. No patent license is granted to make, use, sell, offer for sale, have made, or import embodiments of any patent claims other than the licensed claims defined in Section 2. No license is granted to the trademarks of Licensor even if such marks are included in the Original Work. Nothing in this License shall be interpreted to prohibit Licensor from licensing under terms different from this License any Original Work that Licensor otherwise would have a right to license.

5) External Deployment. The term "External Deployment" means the use, distribution, or communication of the Original Work or Derivative Works in any way such that the Original Work or Derivative Works may be used by anyone other than You, whether those works are distributed or communicated to those persons or made available as an application intended for use over a network. As an express condition for the grants of license hereunder, You must treat any External Deployment by You of the Original Work or a Derivative Work as a distribution under section 1(c).

6) Attribution Rights. You must retain, in the Source Code of any Derivative Works that You create, all copyright, patent, or trademark notices from the Source Code of the Original Work, as well as any notices of licensing and any descriptive text

Answered by Madhurima , an ibibo Master, at 6:09 PM on September 17, 2008

Aruna a software license from the Free Software Foundation (FSF) that ensures every user receives the essential freedoms that define "free" software, which is free of restrictions. Also called "GPL" and "GNU GPL," it was created to distribute the software of the GNU operating system. Approximately 70% of free software packages are released under this license, including most GNU programs and thousands of others. The GNU General Public License is also considered an open source license.

Answered by Keshto Patel , an ibibo Master, at 7:46 PM on September 16, 2008

The GNU General Public License is a free, copyleft license for software and other kinds of works.

The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.

To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.

For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.

http://www.gnu.org/ copyleft/gpl.html


Open source doesn't just mean access to the source code. The distribution terms of open-source software must comply with the following criteria:
1. Free Redistribution

The license shall not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license shall not require a royalty or other fee for such sale.
2. Source Code

The program must include source code, and must allow distribution in source code as well as compiled form. Where some form of a product is not distributed with source code, there must be a well-publicized means of obtaining the source code for no more than a reasonable reproduction cost preferably, downloading via the Internet without charge. The source code must be the preferred form in which a programmer would modify the program. Deliberately obfuscated source code is not allowed. Intermediate forms such as the output of a preprocessor or translator are not allowed.
3. Derived Works

The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software.
4. Integrity of The Author's Source Code

The license may restrict source-code from being distributed in modified form only if the license allows the distribution of "patch files" with the source code for the purpose of modifying the program at build time. The license must explicitly permit distribution of software built from modified source code. The license may require derived works to carry a different name or version number from the original software.
5. No Discrimination Against Persons or Groups

The license must not discriminate against any person or group of persons.
6. No Discrimination Against Fields of Endeavor

The license must not restrict anyone from making use of the program in a specific field of endeavor. For example, it may not restrict the program from being used in a business, or from being used for genetic research.
7. Distribution of License

The rights attached to the program must apply to all to whom the program is redistributed without the need for execution of an additional license by those par

Answered by Om Prakash , an ibibo Master, at 7:33 PM on September 16, 2008

well;
GPL licenses are designed to guarantee your freedom to share and change free software:

When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things.

What this means is that you are free to change the code as you see fit. You aren't locked in to any proprietary system, and not dependent upon any single software vendor to update the software powering your website.

For more information, see the Free Software Foundation’s website on GPL:

http://gnu.org/copylef t/gpl.html

The Free Software Foundation (FSF) advocates use of the GNU General Public License (GPL), but even they gladly accept the use of software not under the GPL as part of their GNU project.

The following are "GNU packages" not under a copyleft license:

* Kawa [fsf.org]: licensed under the Kawa License [gnu.org], which is an X-11/MIT style license. Kawa is a Scheme/Emacs Lisp environment that runs on Java.
* GNU less [fsf.org]: the latest tarball from ftp.gnu.org is GPL, but older versions are non-copyleft.
* Ncurses [gnu.org], which is distributed under an X11-style license.
* Proto [fsf.org], which is a software development tool for finding C and C++ function prototypes, and is in the public domain.
* Quexo [fsf.org], xquery implementation using Kawa to compile to java bytecode. Under the Kawa license, which means an X11-style license.
* Speex [fsf.org], an audio compression codec for voice, under the Xiph.org license (a modified BSD)

Answered by Kishore , an ibibo Master, at 6:16 PM on September 16, 2008

The GNU General Public Licence (GNU GPL or simply GPL) is a widely used free software licence, originally written by Richard Stallman for the GNU project. The GPL is the most popular and well-known example of the type of strong copyleft licence that requires derived works to be available under the same copyleft. Under this philosophy, the GPL is said to grant the recipients of a computer program the rights of the free software definition and uses copyleft to ensure the freedoms are preserved, even when the work is changed or added to. This is in distinction to permissive free software licences, of which the BSD licences are the standard examples.

The GNU Lesser General Public Licence (LGPL) is a modified, more permissive, version of the GPL, originally intended for some software libraries. There is also a GNU Free Documentation Licence, which was originally intended for use with documentation for GNU software, but has also been adopted for other uses, such as the Wikipedia project.

The Affero General Public Licence (GNU AGPL) is a similar licence with a focus on networking server software. The GNU AGPL is similar to the GNU General Public Licence, except that it additionally covers the use of the software over a computer network, requiring that the complete source code be made available to any network user of the AGPLed work, for example a web application. The Free Software Foundation recommends that this licence is considered for any software that will commonly be run over the network.

The GPL was written by Richard Stallman in 1989 for use with programs released as part of the GNU project. The original GPL was based on a unification of similar licences used for early versions of GNU Emacs, the GNU Debugger and the GNU Compiler Collection. These licences contained similar provisions to the modern GPL, but were specific to each program, rendering them incompatible, despite being the same licence.[1] Stallman's goal was to produce one licence that could be used for any project, thus making it possible for many projects to share code.

for more visit:
http://en.wikipedia.or g/wiki/GNU_General_Public_Lice nse

Answered by jaivir , an ibibo Master, at 6:12 PM on September 16, 2008

Some free software projects, notably GNU Guile,[1] the run-time libraries of GNAT,[1] and GNU Classpath,[2] distribute code under the terms of the GNU General Public License (GPL) but with an additional section known as the GPL linking exception.
http://www.answers .com/topic/gpl-linking-excepti on

Answered by Nishu's , an ibibo Master, at 5:29 PM on September 16, 2008

well,(GNU General Public License) the license that accompanies the GNU software from the Free Software Foundation (FSF) and which is also available to distributors of other open source software. The GPL embodies the FSF's "copyleft" rule, which means that anyone is allowed to make changes in the source code and redistribute it as long as the changes are clearly marked, the derivative work is not sold and is also licensed under the GPL.

Answered by Debashis , an ibibo Master, at 3:47 PM on September 16, 2008

WELL ARUNA,
GPL:-Short for General Public License, the license that accompanies some open source software that details how the software and its accompany source code can be freely copied, distributed and modified. The most widespread use of GPL is in reference to the GNU GPL, which is commonly abbreviated simply as GPL when it is understood that the term refers to the GNU GPL. One of the basic tenets of the GPL is that anyone who acquires the material must make it available to anyone else under the same licensing agreement.
The GPL does not cover activities other than the copying, distributing and modifying of the source code

Answered by Venkata , an ibibo Specialist, at 3:30 PM on September 16, 2008