Decal Manual

This document is a preliminary manual for DECAL, a suite comprising a compiler, assembler, and linking loader for the PDP-1 computer system. The manual details the system's features, including algebraic compilation capabilities, binary program relocation, and symbolic cross-referencing between programs. It outlines compiler input formats, character classes, symbol types, and algebraic statement structures. Additionally, it provides a list of action operators, standard constants, and linking loader procedures, including error diagnostics and tape loading instructions.