AbstractA program giving facilities for the setting of mathematical expressions in running text is described. It acts as a pre‐processor to many of the commonly‐available text‐formatting programs running on current multi‐access systems. Particular attention has been given to designing a package that can easily be implemented on the wide variety of equipment in use on these systems, and emphasis has been given to the use of low‐cost, readily‐available peripherals. Equal importance has been attached to the ability to use the system over wide‐area networks, with potential applications in the computerized distribution of mathematical material. A comparison is made of the method adopted for entering mathematical expressions into the program with other methods that are curren