Using as is a user guide to the GNU assembler, as. It provides full documentation on using as, including a review of machine-dependent features and a command-line- options summary. Examples are provided throughout the book. Chapters include. * Overview * Command-Line Options * Syntax * Sections and Relocation * Symbols * Expressions * Assembler Directives * Machine Dependent Features including AMD 29K, ARM, D10V, H8/300, H8/500, 80386, Intel 80960, M680x0, MIPS, SPARC, Z8000, and VAX Using as: The GNU Assembler is a printed version of the GNU as documentation, available online from the Free Software Foundation.