Unix 1.1 System Characteristics

SYSTEM CHARACTERISTICS

The Unix system is divided into two parts. 

1. The first part consists of programs and services that are readily apparent to users, including such programs as the shell, mail, text processing packages, and source code control systems. 
2. The second part consists of the operating system that supports these programs and services.

Properties / Characteristics / General Overview

• The system is written in a high-level language, making it easy to read, understand, change, and move to other machines.
• It has a simple user interface that has the power to provide the services that users want.
• It provides primitives that permit complex programs to be built from simpler programs.
• It uses a hierarchical file system that allows easy maintenance and efficient implementation.
• It uses a consistent format for files, the byte stream, making application programs easier to write.
• It provides a simple, consistent interface to peripheral devices.
• It is a multi-user, multi-process system; each user can execute several processes
• simultaneously.
• It hides the machine architecture from the user, making it easier to write
• programs that run on different hardware implementations.

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