![header thumbnail](/images/publishers\afnor_cover.gif)
NF EN ISO 9241-4 : 1998
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
![header thumbnail](/images/publishers\afnor_cover.gif)
ERGONOMIC REQUIREMENTS FOR OFFICE WORK WITH VISUAL DISPLAY TERMINALS (VDTS) - PART 4: KEYBOARD REQUIREMENTS
18-07-2014
12-01-2013
1 Scope
2 Normative references
3 Definitions
4 Guiding principles
5 Performance criterion
6 Design requirements and recommendations
7 Measurement
8 Conformance
Annex
A Usability test (proposed alternative test)
B Bibliography
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.