although faster than typewriter devices, do not implicitly create records of the user's interactive sessions. Based on the premise that a display terminal session facility that also has the record-keeping functions of typewriter terminals would increase productivity, a research project was undertaken that has resulted in the session manager discussed. Experience with the system is summarized. D...

Circular polarizing filters have recently been introduced in several ophthalmic applications. These applications include clinical instruments for ophthalmoscopy, slit-lamp specular microscopy, and fundus photography, as well as consumer products such as 3-D movie projection and viewing systems and glare-control screens for computer visual display terminals. The nature of circularly polarized li...