| Pros | Cons | | :--- | :--- | | Instant access; no waiting for shipping. | Usually an outdated edition (missing new topics like CNC basics). | | Searchable text (if OCR scanned). | Terrible diagram quality – essential for welding & foundry topics. | | Saves ₹300-400. | Copyright infringement; potential for malware. | | Portable on a phone/tablet. | No index linking (jumps to wrong pages). |