Apple iWork is similar to the Windows Office Suite. It features a spreadsheet, word processor, database and drawing tools. You can also play movies from iTunes.
The spreadsheet included with the iWork software suite is called Numbers.
Apple's Numbers software is the spreadsheet component of their iWork suite.
If you ask them and pay for it local Apple stores will sell you a MacBook with iWork preinstalled but only a demo version of iWork is usually supplied with a new Mac.
A 30 day trial version of iWork can be downloaded from Apple's website (See links below).
One can download iWork from the Apple App Store. The latest version was released in 2009. However, Apple did release iWork for the iPad in 2010 as three separate applications.
A 30 day trial version of iWork '09 can be downloaded from the Apple website. (See links below)
I don't think there is a version of iWork for Windows. However, with iWork '09 now going online, it is possible that Apple will be letting Windows users use the service.
iWork 09 is installed into it's own iWork 09 folder in the Applications folder. It should not touch an iWork 08 installation.
There are apps for clipart that are available for free. One of these apps is Clipart for iWork and iWeb available at the Apple store.
IWork was created on 2005-01-11.
All previous iWork files are readable by late copies of iWork but upon opening them you have to save them to the new format of that version of iWork. For example an iWork '06 document opened in iWork '08 will have to be saved as an iWork '08 document upon opening it, which means you will not be able to open it in a previous version of iWork
A boxed copy of Mac OS X (Leopard) does not include iLife which needs to be purchased separately. Apple does produce a Mac Box Set which includes Leopard, iLife and iWork. iLife is included with all new Macs.