The columns and departments in this issue address various topics related to microservices--that is, programs with a single task (or unit of work) that also include all the connectivity to the outside world as well as the runtime requirements to run the task. Microservices are well-suited for the many complex applications currently being built, from enterprise to Web-scale applications. In particular, microservices work well for new types of applications such as the Internet of Things, where single-function sensors and actuators are deployed in the field.