I find the rules very unclear in how the technology cards should be used. It is not mentioned that they should be in a stack with which players get to buy the card on top of the stack.
But it is neither explicitly said that the technology cards may be bought of our choosing. I figured that there are so many it may become a complex and players would have to commit the different cards to memory before being able to play the game.
So do we get to buy those tech cards we want, or are we depended on whatever the stack pops up?