This paper deals with several selected aspects of the signal distribution in automatic checkout systems. These are: 1) The use of relay matrices as control elements; 2) The inclusion of self-checking capabilities; 3) Problems of systems integration. These aspects are not unique to automatic checkout systems. However, due to the nature of automatic checkout systems as presently being designed around digital circuitry, they find either fuller or different applications than in other types of systems. Also, while they are on the surface somewhat disconnected in nature, they tend to interrelate during the implementation of an automatic checkout system.
Film clips of family vacations. Notable events include a trip to Chattanooga and Mazatlan, Mexico.
Christmas [00:03, 13:25]
Chattanooga Choo-Choo [01:49]
Play [13:09, 18:29]
Train [01:53]
Stone Mountain [07:45]
Mazatlan [17:59]
This leaflet gives an overview of types of film and camera systems being used in photography and observations on Skylab, the first space station launched by the United States.
This video was released in conjunction with Skylab's 30th anniversary in 2003. It contains video footage from the Skylab program as well as interviews with those associated with the program.
