The question asks for the full meaning of the abbreviation 'ASTM'. This abbreviation is commonly used in technical and industrial contexts.
'ASTM International', formerly known as the American Society for Testing and Materials, is a globally recognized leader in developing and publishing voluntary consensus-based standards for a wide range of materials, products, systems, and services. These standards help improve product quality, safety, and reliability, and facilitate trade.
| List - I | List - II |
| A. Kevlar | I. PBO |
| B. Dyneema | II. HDPE |
| C. Zylon | III. PPS |
| D. Ryton | IV. Aramid |