Tools employed by a plumber, carpenter, auto mechanic and other trade professionals are exempt from the personal property tax. In legal terms, this covers "tools of trade" of a "mechanic" (e.g. tools that can fit in a box). Boats, fishing gear and nets - up to $10,000 in value - owned and used in a commercial fishing business are exempt. Computers are also subject to personal property tax, but in cases where they are utilized by a corporation for internal purposes only, computers are not subject to taxation. Tangible personal property subject to some other local tax is also exempt from the personal property tax. Additionally, intangible property (such as stocks, bonds, mortgages) is exempt from the personal property tax.