Abstract: The present invention is a hand-held micro-computer with an attached printer that receives input from a physician and prints out a legible prescription slip for the physician's signature. The micro-computer has a keypad, display, and memory. The memory stores information about prescription drugs and physicians who have access to the micro-computer. When a physician wants to "write" or prepare a prescription slip, the physician enters a personal identification number, thus gaining access to the micro-computer. The physician then selects a drug to prescribe, either by entering a drug identification number or scrolling through a list of drug names. After the specific drug has been selected, the physician may change the default information for that drug or accept it. Once the information is correct, the physician prints out the prescription slip on the attached printer.