Crimefighters' Calculating Computers of the JLA and JSA

After their initial years working in a pre-automatic climate, with the advant of increased technology, both the Justice League and Justice Society developed their own unique computers to aid them in their costumed crimefighter careers. In the years that followed, these instruments would be essential, indeed instrumental, in these twin teams' successful missions, and would on occasion even be used in conjunction with one another across the dimensional barrier when needed.

The first of these groups to develop their own computer was the Justice Society, spurred on by their resident chemist and amateur hardware engineer, Hourman. Known primarily for his work in the field of chemical conconctions while with his former employer Bannermain Chemical, which he would later acquire and renamed Tyler Chemical, Rex Tyler produced his revolutionary "Crime-Caster" which could calculate different probabilities as to crime that he... as Hourman... would have to combat alongside his fellow JSA members. This device was first used simultaneous to the appearance within their brownstone base of an alien entity, the Tornado Champion, that had merged together with the android Red Tornado which joined the Society. As to the Crime-Caster, it would become the basis for T.O. Morrow's future computer.

Soon afterward, following the exposure of their initial secret headquarters by the Joker, the Justice League created a new Satellite headquarters orbiting Earth-One. And to operate this mobile base, League members Superman and Hawkman pooled their Kyrptonian and Thanagarian technology, creating the Justice League Computer. However, as with it's Earth-Two doppleganger, this computer was introduced simultaneous with base of an alien entity, a Dharlu, which had been encased in moon-rocks that were experimemented upon by S.T.A.R. Labs. Traveling with Leaguers Flash and Hawkman to the Satellite, it attempted to retrofit the Satellite into a space vessel that would take it to its extra-terrestrial place of origin. 

The Justice League were able to overpower the Dharlu, and while doing so realized that its prescence within their computer helped it to function correctly. It seemed that the sensitive circuity within the computer were destabilized, however creature was able to correct this flaw. And so, for years thereafter, the Dharlu stayed in frozen suspended animation imprisoned within the Satellite, although on one occasion it was temporarily freed before being captured by Wonder Woman.

As previously mentioned, the two groups on occasion used their computers in conjuction, such as when they were attempting to track down the killer of JSA member Mister Terrific onboard the Satellite. Given that both devices networked seemlessly, it seems that the Society's Computer with 100% Earth-based technology was superior to the melding of the Leaguer's hybrid system that was their Computer. 

It is unknown if the Dharlu survived during this case, as the evil Roger Romaine sabotaged it... causing it to explode in order to cover up his complicity in the hero's death. If the being did survive, undoubtedly it perished following the destruction of the Satellite during a Martian invasion of Earth-One.