By and large, self-cleaning litter boxes use a combination of clumping cat litter, an electronic sensor and an automated raking system to detect soiled clumps of litter and push them into a waiting receptacle.
An automated auditory brainstem response (ABR) test, or brainstem auditory-evoked response (BAER) test, in which brainstem responses to sounds are monitored through small electrodes taped to the child's head.
The do-it-yourself approach provides a constant view of what's really happening in your business, with automated functions avoiding a great deal of time-consuming hand entry work needed for daily accounting.
Darren Rowse, creator of the ProBlogger.net website, enumerates many reasons to avoid all automated blogging tools (in fact, he also recommends against using any automated social media software, including Twitter clients).
While they seem to offer more services, some (such as one-way link building) are unethical by web standards, and others (such as RSS Syndication) are automated, one-click processes that really can't be called a "service".