Fortran for the PDP-1, Version 3

This document provides a technical guide and manual for the Version 3 FORTRAN compiler designed for the PDP-1 computer. It outlines the syntax and rules for writing FORTRAN programs, including arithmetic statements, input/output operations, formatting, "do" loops, "if" statements, and special features like DECAL inserts.

The manual includes sections on:

• System Operations: Instructions for compiling, loading, and executing programs using the required series of paper tapes.
• Error Handling: A comprehensive list of error codes that may be generated by the compiler or during program execution, along with their causes.
• Format Specifications: Detailed explanations for using i, f, x, h, a, and c specifications for data transmission.
• Implementation Details: Technical instructions for system maintainers on compiling and loading the FORTRAN system itself, as well as managing the subroutine package.
• Example Programs: A provided sample program illustrates correct syntax and usage within the PDP-1 environment.