SLO
conceptsService Level Objective — a specific measurable target within an SLA, such as 99.9% uptime, that a service aims to meet
Pronunciation
Correct
S-L-O
/ɛs ɛl oʊ/
Three individual letters, each spelled out. Stands for 'Service Level Objective'. Always an initialism. Part of the SRE framework alongside SLA and SLI.
Source: sre.google(official spec)