The present invention provides liposome compositions containing substituted ammonium andor polyanion, and optionally with a desired therapeutic or imaging entity. The display can be connected to an optional device, and the optional device is also controlled by the terminal. The first-transition-generating includes generating a second transition that leaves from the first state and enters to the second state and that is assigned with the first symbol. A functional digital thermal sensor is disabled in response to the at least one unit being in a power savings mode. The calcium salt may be a non-toxic and label-friendly salt such as calcium sulfate, calcium chloride or calcium phosphate, preferably naturally existing salts. The flow meter is used only to compare near equal flows so does not need to be calibrated nor linear over a wide range.