The field of thermostats has seen many changes in technology from the starting of manufacturing of the first thermostat to the present digital and more advanced thermostats. The technology has largely grown and more sophisticated digital technology is used in the thermostats available today. These thermostats are mainly used in the climatic condition measuring field. A solid state micro computer based thermostat has been designed by White Rodgers named 1F87-361. It is one of the most advanced thermostats of all times having a system for 7 different programs for every day of the week. The operation of White Rodgers named 1F87-361 Manual can be downloaded for your use.