Tape cartridge system implementing variable sized tape cartridges designed for use on the same recording/reproducing apparatus

A tape cartridge system of variable sized tape cartridges capable of recording and/or reproducing information from the same recording and/or reproducing apparatus which comprises;

• a large-size tape cartridge including a first casing having a first height or thickness and including a pair of first reels housed therein and a first magnetic tape of a first length having opposite ends anchored to said first reels, said first casing also including a first memory element having a first set of terminals, said first memory element being housed within said first casing with said first set of terminals being exposed to the outside through at least a rear wall of said first casing, at a first heightwise position which is spaced a predetermined first distance from a level at which a longitudinal mid-center line of said first magnetic tape, intermediate of the width thereof, lies;
• and
• a small-size tape cartridge including a second casing having a second height or thickness and including a pair of second reels and a second magnetic tape of a second length having opposite ends anchored to said second reels, said second casing also including a second memory element having a second set of terminals, said second memory element being housed within said second casing with said second set of terminals being exposed to the outside through at least a rear wall of said second casing, at a second heightwise position which is spaced a predetermined second distance from a level at which a longitudinal mid-center line of said second magnetic tape, intermediate of the width thereof, lies;
• said first and second heights or thicknesses of said cartridges being different from each other while said first and second lengths of magnetic tape have respective widths equal to each other, and said predetermined first and second distances are equal to each other, whereby connecting terminals disposed in said recording and/or reproducing apparatus can be concurrently used for connection with either of said first or second memory elements of said large-size or small-size tape cartridge.