One of the isolinear chips is numbered "47". The call sheet listed computer chips and microchips in the props section for the day of filming while the shooting schedule (p. 1) listed microchips.
In 2378, following Operation Watson when Voyager could have short periods of live contact with Earth every day, Neelix put 146 sequentially numbered isolinear chips in his hat for the crew to pull – to see in which order they would be able to contact their friends and family. (VOY: "Author, Author")
According to the Star Trek: The Next Generation Technical Manual, isolinear chips featured onboard nanotech processors to aid in memory access and had a maximum capacity of 2.15 kiloquads. Though normally easily corrupted, chips could be coated with a layer of clear plastic for protection in environments more hostile than a computer core without affecting read and write capabilities; these strengthened chips were commonly used in tricorders, PADDs, and other handheld devices with isolinear chip drives, and could be handled without using special gloves.