A network of healing terminals scattered throughout Oberon-1. They offer instant first aid and are always publically accessible. Their whole presence is meant to balance out the gameplay, as well as pay homage to Half-Life and the Marathon Trilogy.
These terminals first appear in MAP05: Fear Of The Dark.
When the player presses the 'Use' key, a check runs for the current health amount. If it's 85% or higher, nothing happens. If it's 84% or lower, health is increased by 15% with each 'Use' keypress. Therefore, maximum obtainable health amount that can be added this way is 99%. The terminals are never depleted, but they are also placed in deliberately inconvenient places.