FIG. 1 is a top, front and right side perspective view of a unit for the extension of the functions of electronic computers showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top, front and right side perspective view thereof with the disk tray being pulled out; and,

FIG. 9 is a reference view thereof showing the article in use with a computer being shown in broken lines for illustrative purposes only and forms no part of the claimed design.