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Unix-like - Wikipedia
12 Best open-source Unix like operating systems as of 2024 - Slant
What is UNIX and what's UNIX-like? - Super User
What's the Difference Between Linux and Unix? - How-To Geek
Linux - Wikipedia
Guide to Unix/Why Unix-like - Wikibooks
Unix-like definition by The Linux Information Project (LINFO)
Linux vs. Unix: What's the difference? | Opensource.com
3 UNIX-Like Operating Systems That Aren't Linux - MUO
Unix vs. Linux Comparison Guide | Coursera