Excel mafayilo
PDF (Portable Document Format), mawonekedwe opangidwa ndi Adobe, amaonetsetsa kuti anthu onse aziwona ndi zolemba, zithunzi, ndi masanjidwe. Kusunthika kwake, mawonekedwe achitetezo, komanso kukhulupirika kwake kumapangitsa kuti ikhale yofunika kwambiri pantchito zamakalata, kupatula zomwe adazipanga.
Excel is a popular file format.