Although it was already invented in the 1960s, it took until the mid-1980s before CMOS became the leading technology for VLSI circuits. Prior to that time, only a few circuits were designed in CMOS. These early designs were generally limited to analogue circuits and digital circuits that dissipated little power. Examples include chips for calculators, watches and remote controls. CMOS offers both n-type and p-type MOS transistors. Initially, this meant that CMOS circuits were more costly than their nMOS equivalents.