The document discusses the concept of depreciation in accounting. Depreciation refers to allocating the cost of a tangible asset over its useful life. As time passes, assets wear out and lose value. The document provides an example to illustrate how depreciation is recorded. It describes a computer that was purchased for €1,000 and has a useful life of 5 years. Under the straight-line depreciation method, the computer's value would be reduced by €200 each year over 5 years, until it reaches a value of €0 at the end of its useful life. This process of allocating an asset's cost over its years of use through depreciation expense is an important accounting concept.