Definition: Unix91 is a Unix-like operating system with a Unix flavor, resembling it in some respects but using slightly different syntax. It's often used to run applications written in Unix-style programming languages such as Python and Java on Linux systems. Definition: "Unix91" was an attempt by Apple Research to create an alternative operating system that closely resembles the Unix-like environment of earlier models. This model was built into the iPhone 6s Plus, which is a classic Apple device.
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