https://www.link-group.eu
At first sight, this logo is an abstract letter L.
But it's more than that.
In short, in my concept, it's all about horizontally and vertically and the way how is defined the permanent education. Because what the LinkGroup do with their courses it's called permanent education outside the school, throughout life, regardless of age, (at least in my opinion).

"The permanent education must be regarded as a conception that contains: theoretical foundation, curricular organization (strategies, methodologies, contents, etc.), both vertically (articulation of life cycles with formal, informal, optional, obligatory learning, etc.) as well as horizontally through the articulation of the fields of education: (cognitive, physical, moral-civic, aesthetic etc.), content, forms and methods"