DASYLab 11 from Measurement Computing Corp., Norton, MA, is a graphical programming environment for test and measurement projects. Features include support for most of the company's devices supported by the Universal Library; an improved diagram module that can be configured as an enhanced Y/t chart, an X/Y chart, or as a data chart recorder and allows you to define a reference curve or tolerance band; the reference curve editor lets you define the tolerance band interactively and use it in the chart modules to display the acquired signal against the defined tolerance band; and an enhanced email module that includes an internal SMTP client. Four versions are available; Lite, Basic, Full, and Pro as well as a runtime-only edition for program deployment.