Yes. Several CAD suites have versions for both Windows and Linux, including:
Preemptive (both Windows and Linux).
Download the Kludget Widget Engine on http://www.kludgets.com. It is an open source widget engine that is compatible with Apple's Dashboard Widgets. It runs both on Linux and Windows.
you can partition the drive.. to use both OS
OpenOffice and LibreOffice are both full office suites used in Linux distributions.
Both Windows and Linux can be installed on an Intel Mac, so yes. If you were referring to binary compatibility with Mac OS X, Windows programs can be run using third-party programs like Wine or CrossOver Mac. Programs compiled on Linux are not binary-compatible, but most programs that are open-source and not specific to functionality in Linux can be and have been ported to Mac OS X. Most of these are available via Fink.
You can use OpenOffice.org on Linux to open and edit Microsoft Office documents. OOo includes clones of Word, Excel, PowerPoint, and other Office apps. Abiword will perform a similar job, though only for Word, I believe. Both are available for Windows and Linux and maybe more. If you use those same apps on Linux, then your docs will be usable in Windows as well. This is just the tip of the iceberg in terms of compatibility between Windows and Linux. There is much more!
Both Windows and Linux hosting is powerful. If you use ASP or .NET then you should use Windows hosting platform. If you do not, then you can use the more affordable and more popular Linux hosting platform.
Yes you can. Ubuntu's WUBI uses the Windows bootloader (NTLDR) to boot Linux. It also uses the Windows filesystem (NTFS). This, however, is not the traditional way to do things. The traditional way to dual-boot Linux and Windows is to use a generic bootloader such as Grub to boot both Windows and Linux.
ASUS Eee PC 1000 is a PC-compatible system. that also runs Linux, but not Mac.
Perhaps you could elaborate on your question. While both Windows and Linux are operating systems, Windows has many editions. Windows will run on server side and locally on your PC. If your question pertains to Servers, then your choice should be a Linux based platform. This answer will hold true whether it is your own server, or one that is located on a web hosting site. Both Windows and Linux platforms are still available, However, Linux has much more to offer with the desired tasks.
Yes. Vocaloid is compatible with Windows HP. It can run on both Windows Vista and Windows 7 as well.
By means of an external drive, linux and windows are different OSes, but you may use those very same files in both. If you are using the same computer with a dual boot you may use, again, an external drive or just browse windows folder after mounting it in your linux OS.