Backbone(vertical) cabling vs Horizontal Cabling

This is from Cisco:

Similarity: both connects from telecommunication room.

Difference:
Backbone = vertical: connect to equipment room(where servers are).
Horizontal: connects to work area( where individual pcs and desktops are).

Telecommunications Room:
The telecommunications room is where connections to intermediary devices take place. These rooms contain the intermediary devices - hubs, switches, routers, and data service units (DSUs) - that tie the network together. These devices provide the transitions between the backbone cabling and the horizontal cabling.