Development, or Beta or Research candidate, depending on the stage.
yes
When installing a new version of iTunes only the iTunes software is updated your library is not touched.
The Mas 90 is an accounting software offered by Sage. It was first distributed in the mid 1980s and is still being offered till now. Starting from the version 1.0, up to the version 4.5, this software has been released in multiple versions.
Windows Movie Maker version 2.6.
An AOSD either refers to an aspect-oriented software development, or adult-onset Still's disease.
Ubuntu does not support all software, since some kinds of software do not yet have a version that for Linux. However, many popular software can still be used in Ubuntu either in Wine or a virtual machine.
The PC would need software to run a PS2 game. The only software that exists is still in the Beta or development stage at this time.
The best professional version is the H&R Block tax software. They have a guarantee and you may be able to still get help from them even though it is a professional license.
When using the PSN you must get the update software before you can go to the store and download.
You must mean Beta Software. Beta Software is pre-release software still in the process of development made available to "beta-testers" for the purpose of identifying problems in the application. Because of the nature of beta software, running such software could potentially cause system-wide problems.
In theory yes. Your software will stay updated buy the 2009 version has new features that help to stay more protected. Sometimes older anti malware software will receive certain updates. While the newest version might receive other updates that provide better protection. If you are considering buying it buy it now because the economy is weak and businesses are dropping prices. But don't get me wrong your software will still stay updated but I recommend you purchase the newest version.
Downgrading software is virtually impossible. Usually companies produce newer versions of software - to improve it. This can be because they've found a 'bug' in the older version. Once a new version of the software is installed, you would need a copy of the older version (on disk or on a computer) - then you would need to remove the newer version from the phone - and re-install the older version. HOWEVER - there's no guarantee your phone would still work !... AND you would have to back-up all your contacts, music, pictures apps and other stuff you wanted to keep BEFORE you attempted to 'roll back' the software !