Firefox 4 RC2 released

Mozilla has just released the release candidate 2 (RC2) build of its Firefox 4 browser. It now seems that the final version of Firefox 4 will be available on March 22, the expected release date for it. Grab the RC 2 build of Firefox 4 for Windows, Mac OS X, and Linux.
Mozilla Firefox 4 is almost here! We updated the Firefox 4 release candidate with some minor security fixes and updates to several localizations, including the addition of a Vietnamese localized version.

Firefox will now ship in 80 languages. We’re excited to deliver the new features, look and speed of Firefox 4 to our more than 400 million users worldwide.


What’s New in Firefox 4 RC 2:

• Blacklisted a few invalid HTTPS certificates
• Updated localizations for 29 locales
• Added Vietnamese localization, bringing the total languages available in Firefox 4 to 83

 Download Firefox 4.0 RC2

Python + .NET = IronPython

IronPython is an implementation of the Python programming language running under .NET and Silverlight. It supports an interactive console with fully dynamic compilation. It's well integrated with the rest of the .NET Framework and makes all .NET libraries easily available to Python programmers, while maintaining compatibility with the Python language. There also is Visual Studio tooling integration.

IronPython is an open source project freely available under the Apache License v2.0. The sources are stored on GitHub as part of the IronLanguages project.

IronPython is an excellent addition to the .NET Framework, providing Python developers with the power of the .NET framework. Existing .NET developers can also use IronPython as a fast and expressive scripting language for embedding, testing, or writing a new application from scratch.


The CLR is a great platform for creating programming languages, and the DLR makes it all the better for dynamic languages. Also, the .NET framework (base class library, presentation foundation, Silverlight, etc.) gives developers an amazing amount of functionality and power.

Thanks to all the users over the years who provided feedback that helped shape IronPython!

Run IronPython in your web browser

F#: a succinct, expressive and efficient functional and object-oriented language for .NET which helps you write simple code to solve complex problems.

F# brings you type safe, succinct, efficient and expressive functional programming language on the .NET platform. It is a simple and pragmatic language, and has particular strengths in data-oriented programming, parallel I/O programming, parallel CPU programming, scripting and algorithmic development. It lets you access a huge .NET library and tools base and comes with a strong set of Visual Studio development tools. F# combines the advantages of typed functional programming with a high-quality, well-supported modern runtime system.

This combination has been so successful that the language is now a first class language in Visual Studio 2010, and can also be used on Mac, Linux and other platforms. F# originates from Microsoft Research, Cambridge, and the MSR F# team, led by Don Syme, continues as partners with the Microsoft Developer Division. We seek to continue to break new ground in programming language design and implementation by making F# even better in upcoming versions.

For further information on using F# today, see fsharp.net.

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Timeline of programming languages

Pre-1950

Year	Name	Chief developer, Company	Predecessor(s)
~1837	Analytical Engine order code	Charles Babbage and Ada Lovelace	*
1943-5	Plankalkül (concept)	Konrad Zuse	*
1943-6	ENIAC coding system	John von Neumann, John Mauchly, J. Presper Eckert, Herman Goldstine after Alan Turing	*
1946	ENIAC Short Code	Richard Clippinger, John von Neumann after Alan Turing	ENIAC coding system
1946	Von Neumann and Goldstine graphing system (Notation)	John von Neumann and Herman Goldstine	ENIAC coding system
1947	ARC Assembly	Kathleen Booth	ENIAC coding system
1948	CPC Coding scheme	Howard H. Aiken	Analytical Engine order code
1948	Curry notation system	Haskell Curry	ENIAC coding system
1948	Plankalkül (concept published)	Konrad Zuse	*
1949	Brief Code	John Mauchly and William F. Schmitt	ENIAC Short Code
1949	C-10	Betty Holberton	ENIAC Short Code
1949	Seeber coding scheme (concept)	Robert Seeber	CPC Coding scheme