Line 4:1·"Application" is not a recognised heading for this article type.
"Advantages"
Line 6:1·"Advantages" is not a recognised heading for this article type.
"Limitations"
Line 8:1·"Limitations" should be H2, not H1.
Biographical Lifespan
suggestion
"History and etymology"
Line 10:1·A bold element in the History and etymology section should be a person; it would be useful to have their lifespan details: '<h4>History and etymology</h4> <p>It is named after <strong>G W Eklund</strong> '