Camera images usually contain additional description about camera settings and scene information of the the picture taken. By using EXIF, you can view this data online.
You will learn how to set a link in a table or a single cell with a help of a short on.click script using Adobe Dreamweaver. Using tables may be a bit old school, but it's a great way to learn about the HTML basics.
You can add multiple desktops to the Mac OS X Mountain Lion by using Mission Control, formerly known as Spaces. Can be really useful if you are a busy multi-tasker.