Operating System (In the context of an actual map, OS stands for Ordnance Survey, the national mapping agency for Great Britain.)
"ms" on an OS map typically stands for "map symbol." These symbols are used to represent different features on the map, such as roads, buildings, and natural landmarks.
On an OS map, it's a Public House
it means boo boo
Post Office
Green is typically used to represent forests on an OS (Ordnance Survey) map. It helps observers easily identify wooded areas as they navigate through the map.
The OS map sign for a public house is a blue square with a white interior and a black silhouette of a beer mug or bottle.
a red line
Place of Worship
The two swords on an Ordnance Survey (OS) map represent a feature called a "Battle Site." This symbol signifies the location of a historic battle or conflict.
red is a road and the blocks are little houses
In the United Kingdom, a Government body, The Ordnance Survey (OS), surveys and prints maps of the UK at various scales.