ECU V1.4 is a Sky Visualization Program for Microsoft Windows 3.x called "The Earth Centered Universe". It is capable of simulating many of the features of the Earth's sky. You only need to enter your geographic location and the time and the local sky is simulated on the screen in a colourful display. This includes, but is not limited to the stars, planets, Sun, Moon, and "deep sky" objects. Constellation, coordinate grid, ecliptic, and local horizon lines are also displayed. ECU is designed as an observing tool for the observing amateur astronomer, but is equally useful to the "armchair" astronomer or other interested person interested in the night sky.