Security & Windows in the House
Gosh, thanks to Bill Gates, it's hard to find information on securing windows at home(i.e. the kinds with glass that you look through). I was looking for stuff on what kind of windows are naturally the most secure, but ended up finding tons and tons of pages on Microsoft's OS. A Yahoo! page about tips for securing your home did offer this for windows: "Key locks are available for all types of windows. Double-hung windows can be secured simply by "pinning" the upper and lower frames together with a nail, which can be removed from the inside. For windows at street level, consider iron grates or grilles. For windows opening onto a fire escape, metal accordion gates can be installed on the inside."
I'll come back to this subject later when I have more time to refine a search and hunt through the results, but in the meantime, you may want to check out the complete article: Home Security Basics