Many monochrome alphanumerical displays without picture information still use TN LCDs. Gates were renamed alphanumerically and baggage claim numbers were renumbered from alphanumerical to numerical. Neon lamps with several shaped electrodes were used as alphanumerical displays known as Nixie tubes. An alphanumerical outline uses alternating letters and numbers to identify entries. Every descriptor also carries a unique alphanumerical ID that will not change. The GPU was able to draw lines, rectangles and alphanumerical characters by hardware. BUMED is divided into ten departments, each referred to with an alphanumerical code. Index terms can consist of a word, phrase, or alphanumerical term. The alphanumerical code goes to the right of the city/parish. The train ends also followed the EPB style and incorporated a two-character alphanumerical headcode. The current alphanumerical system (two letters followed by five numbers) was introduced in 1971. On 17 July, the ship was given the alphanumerical designation PG-21.