Three kinds of evidence
Measurement methods establish how specified quantities are measured. Technical memoranda address particular methods or technical topics. Recommended practices address applications. Start with the question, then choose the document; avoid treating every report or file as interchangeable.
Read the identifier and the scope
The entries below reflect official public product listings checked October 4, 2026. Edition suffixes and errata matter. Before making a project requirement, check the official record again and obtain the applicable full text.
Public metadata has limits
We verified titles, displayed identifiers, purposes and public contents. We have not reproduced protected numerical tables or full procedures. A catalog synopsis establishes subject coverage; it does not validate a design, certify a product or replace the complete standard.
Resolve inconsistent metadata carefully
Some official catalog fields conflict: the LM-63 descriptive paragraph discusses a different test topic, and some citation years differ from displayed identifiers or publisher fields. This directory uses the displayed document identifier and relevant title/contents; it does not propagate those inconsistent paragraphs. The research record retains the caveats.