Izzy's Laptop / Digimon Analyzer
Izzy has a Pineapple laptop, which he takes everywhere (and he doesn't like people thumping it - he thumps them when they do). Later, Gennai loads the Digimon Analyzer program onto the laptop. This program analyzes Digimon and provides the Digidestined with information on them. In later seasons, this program is built into the variously named Digivices.