TrueType Font (TTF) files were originally invented by Apple. However, they can be opened on both Apple Macintosh and Windows platforms. It's easy to open a TTF file and install it.
Locate the TTF file you want to open and install it in a folder on your computer's desktop, CD disc or USB thumb drive.
Navigate to the "Start" menu and select "Settings" and the "Control Panel." Click the "Switch to Classic View" link in the left pane.
Click the "Fonts" icon. The fonts installed in your computer appear.
From the "File" menu, select "Install New Font." The Add Font dialog appears.
Browse to the TTF file you want to install. Make sure the box next to "Copy font to Fonts folder" is checked. Click "OK." The font subsequently installs. You should now be able to open the TTF file in other programs and use it as a font.