Excel IMSEC function

While checking the availablity of the new temporary site, I encountered this description of a Microsoft Excel function called IMSEC. When I founded IMSEC in 1999, I was not aware of any existing function bearing this name; this is probably a later add-on. Never mind: The function separates the real and imaginary part of a complex number. As with IMSEC I try to separate the real from the imaginary part of complex problems, my name was wisely chosen (or the function one, whichever was fist ;-) ).