Exports can be categorized into technological classifications of: low, medium-low, medium-high, and high,based on research conducted by Sanjaya Lall ("The Technological Structure and Performance of Developing Country Manufactured Exports, 1985-1998" – see research paper attached). This research argues that export structures, being path-dependent and difficult to change, have implications for growth and development.
Attached is the technological classification of exports under SITC rev. 2 and OECD’s technological classification under ISIC rev. 3.