This board is meant to be used together with the standard tech board, in a multiplayer game. It also records available tech, but can be passed around the table, so that people won't have to get up to look at the board.
When a tech tile is drawn, place it on the standard board and mark the corresponding checkbox on this board. When someone picks that tile, fill the checkbox (you can do it in the player's colour to record who has taken which technology).
This tech board is a modification of the designers' compact tech board file, posted here. The idea was posted in these forums by another user, David Etherton.