Which type of intelligence is derived from unclassified or non-official sources?

Open-Source Intelligence (OSINT) is the correct answer because it refers specifically to information that is collected from publicly available sources. This can include news articles, social media, blogs, and various other forms of unclassified content that anyone can access. The primary attribute of OSINT is that it does not rely on classified information or government sources, making it a vital tool for gathering insights without violating privacy or security measures.

This type of intelligence is especially valuable for situational awareness, trend analysis, and gauging public sentiment, as it allows analysts to compile extensive information without needing special access or clearance. OSINT can be particularly effective in situations where other forms of intelligence gathering may be limited or require costly resources.

In contrast, other intelligence types involve different sources. Signal Intelligence (SIGINT) deals with intercepted communications and electronic signals, Human Intelligence (HUMINT) depends on information gathered from human sources, usually involving espionage or informants, and Geospatial Intelligence (GEOINT) focuses on imagery and maps for analysis of geographical information. Each of these has its own methodologies and classifications, which differentiate them from the open-source nature of OSINT.