Another method will be the Open Office which is a free selection of office programs, very much like msoffice, that includes a Word processor like Word. Open Office allows you to produce PDF also to read Word files. Here the feature set seems not really dissimilar, a little different from Acrobat and Expression , thus there could be difficulties with compatibility. However it is a well-supported open source software having an assisting and energetic user community. Appropriately, Adobe is definitely the best choice whether convert PDF back or you need to convert your Concept document.
