Property and Equipment
Property and equipment is stated at cost and depreciated using the straight-line method over the shorter of the estimated useful life of the asset or the lease term. The estimated useful lives of our property and equipment are generally as follows: computer software developed or acquired for internal use, three years; computer equipment, two to three years; buildings and improvements, five to 15 years; leasehold improvements, two to 10 years; and furniture and equipment, one to five years. Land is not depreciated.