If you happen to have a somewhat realistic SCP mod or texture pack or something like that, and you want some realistic signs, labels, and keycards to go with it, this really small mod adds some labels, signs, and keycards. They are pretty decorative. Above i have 2 examples of 2 labels used in a facility made from vanilla Minecraft blocks. You can combine them with an SCP mod if you want things to feel more proper, or something.
Latest supported Minecraft version