Koisherminal.carrd.co/Terminals

Terminals are tall, primarily yellow, and rectangular computers, roughly about the same height as an average human male (5.6 feet / 66 inches).
 The terminal was created in response to a perceived need for easier means of communications as the expedition became far more elaborate, dangerous predictable and costly. As the Expedition's grounds had covered more ground than was thought possible, the previously standard means of talking, which for the longest time was simply speaking to each other over walkie-talkies (which themselves were being strained and noisy due to radio interference)1 were discarded upon the terminal's 'perfection'.
 Terminals themselves are not capable of much other than transmitting and receiving data, and their communications prowess is derived from their ability to tap into a larger databank. This database was specially provided for the Expedition and a firm firewall allows for a swift transfer of any digital information without the common problem of 'leeching'2 affecting the flow.It is believed terminals are capable of artificial intelligence, They very much are! Check me out, for crying out loud! though this was something not tested during their prototyping era and it is widely hand-waved as a improbable occurrence.
 1 - Radio towers have been sighted in Gensokyo, though it is unclear if they are capable of the same pedigree of communication that standard Earth radio towers can perform.
 2 - 'Leeching' is the derogatory term for a data-capable machine managing to slow down a database by causing an 'overflow', or when a database is unable to maintain a standard level of data transmission speed due to having too many recievers.