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In Office 2007, protection was significantly enhanced by using AES as a cipher. [4] Using SHA-1 as a hash function, the password is stretched into a 128-bit key 50,000 times before opening the document; as a result, the time required to crack it is vastly increased, similar to PBKDF2, scrypt or other KDFs.
Safe mode is a diagnostic mode of a computer operating system (OS). It can also refer to a mode of operation by application software . Safe mode is intended to help fix most, if not all, problems within an operating system.
PowerPoint 3.0, which was shipped in 1992 for both Windows and Mac, added live video for projectors and monitors, with the result that PowerPoint was thereafter used for delivering presentations as well as for preparing them. This was at first an alternative to overhead transparencies and 35 mm slides, but over time would come to replace them. [54]
A compatibility mode is a software mechanism in which a software either emulates an older version of software, or mimics another operating system in order to allow older or incompatible software or files to remain compatible with the computer's newer hardware or software. Examples of the software using the mode are operating systems and ...
Mac: The classic Mac OS supported system extensions known generally as FKEYS which could be installed in the System file and could be accessed with a Command-Shift-(number) keystroke combination (Command-Shift-3 was the screen capture function included with the system, and was installed as an FKEY); however, early Macintosh keyboards did not support numbered function keys in the normal sense.
Because computer parts contain hazardous materials, there is a growing movement to recycle old and outdated parts. [67] Computer hardware contain dangerous chemicals such as lead, mercury, nickel, and cadmium. According to the EPA these e-wastes have a harmful effect on the environment unless they are disposed of properly.
Sleep mode and hibernation can be combined: the contents of RAM are copied to the non-volatile storage and the computer enters sleep mode. This approach combines the benefits of sleep mode and hibernation: The machine can resume instantaneously, and its state, including open and unsaved files, survives a power outage.
Microsoft Corporation is an American multinational technology conglomerate headquartered in Redmond, Washington. [2] Founded in 1975, the company became highly influential in the rise of personal computers through software like Windows, and the company has since expanded to Internet services, cloud computing, video gaming and other fields.