Model number. Sometimes abbreviated as Model or Model No. , a Model number is a unique number given to each product made by computer and computer hardware manufacturers. Model numbers allow manufacturers to keep track of each hardware device and identify or replace the proper part when needed.
The Tigris and Euphrates, with their tributaries, form a major river system in Western Asia. From sources in the Taurus mountains of eastern Turkey they flow by/through Syria through Iraq into the Persian Gulf.he TigrisâEuphrates Basin is shared by Turkey, Syria, Iraq, Iran and Kuwait.
Tigris-Euphrates river system. Tigris-Euphrates river system, great river system of southwestern Asia. It comprises the Tigris and Euphrates rivers, which follow roughly parallel courses through the heart of the Middle East. The lower portion of the region that they define, known as Mesopotamia (Greek: âLand Between the Riversâ), was one of the cradles of civilization.