Computer that allows downloading (and uploading in some cases) of files by the use of file transfer protocol (FTP) over the internet. There are over a thousand FTP sites with hundreds of thousands of text, graphics, sound, and video files freely available to anyone. However, a FTP site is not a website because its data cannot be displayed like a webpage. See also anonymous FTP.
Scientific tools for making observations include a microscope, which is a tool used to see very small objects. In your science lab you use a compound microscope to see cells in 2-D, but a scientist can use a scanning electron microscope to view tiny objects in 3-D.
A knife is a tool with a cutting edge or blade, hand-held or otherwise, with most having a handle. Some types of knives are used as utensils, including knives used at the dining table and knives used in the kitchen. Many types of knives are used as tools, such as the combat knife carried by soldiers, the pocket knife carried by hikers and the hunting knife used by hunters. Knives are also used as a traditional or religious implement, such as the kirpan. Some types of knives are used as weapons, such as daggers or switchblades.