Described is a method for retracting an instant message from a receiver in an instant messaging session. In one aspect, calibration of the path length between the sending and receiving transducers and calibration of the transducer delay time over a wide temperature range are optimized. The modified constant velocity CV joint control linkage may include an input push rod assembly that is self-aligning, deflectable and of an adjustable length. The permanently recorded alignment attributes are measured for placement error using a conventional overlay metrology tool. Weak and flexible beams can be used to tolerate large displacements with very little resistance. 3V, a second power supply operating during only the power-ON state, and supplies a source of a second predetermined voltage of 5V, a first device driven by the first power supply, and capable of communicating via the bus when the pull-up voltage Vp is equal to either of 3.