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File size is a measure of how much data a computer file contains or how much storage space it is allocated. Typically, file size is expressed in units based on byte . A large value is often expressed with a metric prefix (as in megabyte and gigabyte ) or a binary prefix (as in mebibyte and gibibyte ).
The big change in PowerPoint 2007 and PowerPoint 2008 for Mac (PowerPoint version 12.0) was that the stable binary file format of 97–2003 was replaced as the default by a new zipped XML-based Office Open XML format (.pptx files). [270]
Files that were too large for 32-bit operating systems to handle came to be known as large files. While the limit was quite acceptable at a time when hard disks were smaller, the general increase in storage capacity combined with increased server and desktop file usage, especially for database and multimedia files, led to intense pressure for ...
.ppt – Legacy PowerPoint presentation.pot – Legacy PowerPoint template.pps – Legacy PowerPoint slideshow.ppa – Legacy PowerPoint add-in; OOXML.pptx – PowerPoint presentation.pptm – PowerPoint macro-enabled presentation.potx – PowerPoint template.potm – PowerPoint macro-enabled template.ppam – PowerPoint add-in
Office 2007 also introduced Office Open XML file formats as the default file formats in Excel, PowerPoint, and Word. The new formats are intended to facilitate the sharing of information between programs, improve security, reduce the size of documents, and enable new recovery scenarios.
The word directory contains the document.xml file which is the core content of the document. [Content_Types].xml This file provided MIME type information for parts of the package, using defaults for certain file extensions and overrides for parts specified by IRI. _rels This directory contains relationships for the files within the package.
For XLSX files that can be opened but not edited, there is another attack. As the file format is a group of XML files within a ZIP; unzipping, editing, and replacing the workbook.xml file (and/or the individual worksheet XML files) with identical copies in which the unknown key and salt are replaced with a known pair or removed altogether ...
Word, Excel, and PowerPoint on the web can all natively open, edit, and save Office Open XML files (docx, xlsx, pptx) as well as OpenDocument files (odt, ods, odp). They can also open the older Office file formats (doc, xls, ppt), but will be converted to the newer Open XML formats if the user wishes to edit them online. Other formats cannot be ...