A PDF is not an island. You can copy a Strong’s number from the PDF and paste it into Logos Bible Software, Blue Letter Bible, or BibleHub. You can take a screenshot of a Greek dictionary entry and paste it into your sermon notes or a WhatsApp theology group. This interoperability is impossible with a dead-tree edition.
One rainy Tuesday, Mateo found a link on an obscure theological repository titled: "Nueva Concordancia Strong Exhaustiva – Edición Optimizada PDF." nueva concordancia strong exhaustiva pdf better