Author Archive

Scanned PDF files? If you haven’t used a scanner before, it’s simply a PDF that’s been optically scanned and turned into a digitized replica of the original paper file. The obvious benefit of doing so is that once digitized it … Continue reading →

A watermark is a recognizable image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the … Continue reading →

The standard security provided by Acrobat PDF consists of two different methods and two different passwords, “user password” and “owner password”. A PDF document may be protected by password to open (‘user’ password) and the document may also specify operations … Continue reading →

All operations (except the document open password protection, if applicable) which are restricted by “owner” or “user” passwords are trivially circumvented by many commonly available “PDF cracking” software and even freely online, and if circumvented these restrictions no longer let … Continue reading →

The Microsoft Reader .LIT file format is a modification of the HTML Help CHM format. CHM files are sometimes used for e-books.  Sumatra PDF supports viewing CHM documents since version 1.9.

A new version of PDF standard is under development under the name ISO/CD 32000-2 – Document management—Portable document format—Part 2: PDF 2.0 (as of July 2011). PDF 2.0 was accepted by ISO as a new proposal. Anyone may create applications … Continue reading →

Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. Excel 2010 is the newest version of Excel.

Web pages is usually in HTML or XHTML format, and may provide navigation to other web pages via hypertext links. Web pages frequently subsume other resources such as style sheets, scripts and images into their final presentation.   Client-side computer … Continue reading →

The standard security provided by Acrobat PDF consists of two different methods and two different passwords, “user password” and “owner password”. A PDF document may be protected by password to open (‘user’ password) and the document may also specify operations … Continue reading →

iPod Touch is not only a portable media player, but a personal digital assistant, handheld game console, and Wi-Fi mobile device for users.   On October 4, 2011 at Apple’s “Let’s Talk iPhone” event iOS 5 and the iPhone 4S … Continue reading →