Build - Builds are unrefined relases of NahiOS and internal builds, rarely publically released in modern development and was for the early days.
Preview - More refined than builds, were released in the early days before alpha's and beta's.
ISNE - Stands for "Initial Setup for Nahios Evolution", its a release intended to be used and updated because an ISO wont be sent out for a while.
Alpha - Versions that are early in development but are refined for semi long term use.
Beta - Versions that are semi early in development but are refined for long term use.
RC - Stands for "Release Canidate" and are the first few versions befoe the offical Release.
Release - Last Release of an ISO file, all updates would be on nahipkg.
Hotfix - Small updates that mostly fix minor bugs.
Patch - Small updates that mostly fix semi major bugs.
CVEfix - Bug fix for major vulnerabilities.
Build - Small feature updates.
Update - Larger Updates for features.