Ergonomics of human-system interaction - Part 20: An ergonomic approach to accessibility within the ISO 9241 series
Edition 2021-11

Information technology - Fibre distributed data interface (FDDI) - Part 20: Abstract test suite for FDDI physical medium dependent conformance testing (PMD ATS)
Edition 2001-03

Road vehicles - Metric starter motor pinions - Part 2: Pinions with 20° pressure angle
Edition 1994-10

Calculation of load capacity of bevel gears - Part 20: Calculation of scuffing load capacity - Flash temperature method
Edition 2021-04

Ceramic tiles - Part 20: Determination of deflection of ceramic tiles for calculating their radius of curvature
Edition 2022-06

Biological evaluation of medical devices - Part 20: Principles and methods for immunotoxicology testing of medical devices
Edition 2006-08

Road vehicles - Liquefied natural gas (LNG) fuel system components - Part 20: Flexible fuel or vent lines
Edition 2023-08

Industrial automation systems and integration - Parts library - Part 20: Logical resource; Logical model of expressions
Edition 1998-07

Industrial automation systems and integration - Parts library - Part 20: Logical resource: Logical model of expressions; Technical Corrigendum 1
Edition 2014-07

Plastics pipes and fittings - Pressure reduction factors for polyethylene pipeline systems for use at temperatures above 20 degrees C
Edition 2017-07