3. System Software Operating Systems Utilities CLI Command Line Interface Drivers Assistants GUI Graphical User Interface NLI Natural Language Interface
10. Examples of File Extensions .fla, .swf Adobe Flash .mp3 Audio .pdf Adobe Writer .txt Notepad / text editors .html Web pages .bmp, .jpg, .gif Graphics software .mdb MS Access .ppt MS PowerPoint .xls MS Excel .doc, .docx MS Word