0W
0W (zero W) or 0-W may refer to:
- 0W, zero west, or 0°W, coordinate of the prime meridian
- 0W or ZW, or zero width, a non-printing character used in computer typesetting of some complex scripts
- Zero-width joiner
- Zero-width non-joiner
- Zero-width space
- Zero-width non-breaking space
- Zero waste, an environmental concept