- Any scanning which follows the shape of a helix, or approximately so.
- In radars, scanning in which the pattern of the beam approximates the shape of a helix.
- In a video tape device, such as a VCR, recording and/or playback in which the heads contact the tape following a diagonal path which forms a helix. The tape is wrapped at an angle around a rapidly rotating drum upon which the video heads are mounted.
- In fax, scanning which follows the shape of a helix.
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