1. Work of Sena
Guide of Learning Nº2 (Number Two)
Area:
English
Group:
Metal Heads
Work Elaborated For:
Carlos Quintero Gómez
Daniel Mena Grimaldo
Daniela Yusti Cano
Mónica Andrea Giraldo
Grade:
Ten - Three (10º3)
Work Elaborated For
Specialized teachers of the Sena on the topic
Teachers of English of the I.E. GABO
Delivery date:
On October 25, 2010
Cartago – Valle
2009 – 2010

2. Table of contents
1. Compressor 7 Zip? ...........................................................................................3
Wath is compressor 7 Zip…………………………………………………………..
Variants……………………………………………….......................................5
1. Mozilla Firefox……………………………………………………..………….6
What is Mozilla Firefox……………………………………………………………..
2. Burning Alcohol 120…………………………………………………………7
What is Burning Alcohol 120……………………………………………………...8

3. 1. 7 ZIP
WHAT`S ZIP?
7-Zip is an open source file archiver designed originally for Microsoft Windows.
7-Zip operates with the 7z archive format, and can read and write to several
other archive formats. The program can be used from a command line interface,
graphical user interface, or Windows shell integration. 7-Zip began in 1999[1]
and is actively developed by Igor Pavlov. It is related to a cross-platform port,
p7zip.
7-Zip is distributed under the GNU Lesser General Public License. It was the
winner of the SourceForge.net 2007 community choice awards for "Technical
Design" and for "Best Project"
By default, 7-Zip creates 7z format archives with a .7z file extension. Each
archive can contain multiple directories and files. As a container format, security
or size reduction are achieved using a stacked combination of filters. These can
consist of pre-processors, compression algorithms, and encryption filters.
The core .7z compression uses a variety of algorithms, the most common of
which are bzip2, LZMA2, and LZMA. Developed by Igor Pavlov, LZMA is a
relatively new system, making its debut as part of the 7z format. LZMA consists

4. of a large LZ-based sliding dictionary up to 4 GB in size, backed by a range
coder.
The native 7z file format is open and modular. All filenames are stored as
Unicode.
The official 7z file format specification is distributed with the program's source
code. The specification can be found in plain text format in the doc subdirectory
of the source code distribution.
7-Zip supports a number of other compression and non-compression archive
formats including:
Packing/unpacking of ZIP, gzip, bzip2, tar and, in betas for version 9, xz.
Unpacking only: Microsoft cabinet (CAB) files, RAR, MSLZ, SWF, FLV, ARJ, Z,
LHA, cpio, smzip, JAR, ISO CD/DVD images (7Zip version 4.42 and up), DMG,
HFS, rpm and Debian deb archives.
According to the 7-Zip website, since version 4.65 (from 2009-02-03), 7-Zip can
unpack the following formats in addition to the formats it fully supports: ARJ,
CAB, CHM, cpio, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM,
UDF, WIM, XAR and Z.
7-Zip is able to open some MSI files, allowing access to the meta-files within
along with the main contents. Some Microsoft CAB (LZX compression) and
NSIS (LZMA) installer formats can be opened, meaning that 7-Zip can be used
to check if a binary file is an archive. Similarly, some executable programs
(.EXEs) may be opened as archives and have their contents extracted by 7-Zip.
Since the 7-Zip 9.14 beta, 7-Zip can open and view the content of virtual hard
disks.
When compressing ZIP or gzip files, 7-Zip uses a home-brewed DEFLATE
encoder which is often able to achieve higher compression levels than the more
common DEFLATE implementation of zlib, at the expense of compression
speed. The 7-Zip deflate encoder implementation is available separately as part
of the AdvanceCOMP suite of tools.

5. Variants
In the form of p7zip, the command line version has been ported for use on Unix-
like systems including Linux, FreeBSD, Mac OS X and AmigaOS 4. There are
several GUI frontends for p7zip such as Q7Z. An alternate GUI for 7-Zip on
Windows, #7Z, has been released by the same developers. A GUI frontend for
p7zip on the Mac OS X operating system named keka is also available.
Two command line versions are provided: 7z.exe, using external libraries; and a
standalone executable 7za.exe containing built-in modules. However, 7za's
compression/decompression support is limited to 7z, ZIP, gzip, bzip2, Z and tar
formats. A 64-bit version is available for 64-bit editions of Windows, with support
for large memory maps leading to faster compression. All versions support
multi-threading.
.
One notable limitation of 7zip is that, while it supports file sizes of up to 16
exabytes, it has an unusually higher overhead allocating memory for files on top
of the memory requirements for performing the actual compression.
Approximately 1 kilobyte is required per file (More if the pathname is very long)
and the file listing alone can grow to an order of magnitude greater than the
memory required to do the actual compression. In real world terms, this means
32-bit systems cannot compress more than a million or so files in one archive
as the memory requirements exceed the 2GB process limit.
64-bit systems do not suffer from the same process size limitation, but still
require several gigabytes of RAM to overcome this limitation. Archives created
on such systems would be unusable on machines with less memory however.

6. 2. Mozilla Firefox
What is?
Mozilla Firefox is a free web browser and of opened code, and that any user
can help to his development. Descendant from Mozilla Application Suite and
nowadays developed by the Corporation Mozilla, the Foundation Mozilla.
Mozilla Firefox is the second mariner most used of Internet, with a market share
of 22,96 % at the end of September, 2010, according to the signature Net
Applications. Other sources of global measurement place Firefox's use between
21 % and 32 %.
To visualize web pages, Firefox uses the engine of rendered Gecko, which
implements web current standards besides other functions, some of which are
destined to anticipate probable additions to the web standards.
It includes navigation for eyelashes, orthographic corrector, progressive search,
dynamic scoreboards, an administrator of unloads, private navigation,
navigation with georreferenciación and an integrated system of search that uses
the search engine that the user wishes. In addition functions can be added
across complements developed by third parties, between which there is a wide
selection, characteristic that has attracted many of the current users of the
mariner.
Firefox is a mariner multiplatform and is available in several versions of
Microsoft Windows, Mac YOU X, GNU/Linux and some systems based on Unix.

7. 3. Alcohol 120
What is?
Alcohol 120%, is a powerful Windows CD and DVD burning software that
makes it easy to create backups of DVDs* and CDs. Additionaly, the program
lets you store your most used CDs as images on your computer, and you can
mount them on 1 of the 31 virtual drives with a click of a button.

8. Our burning software includes a Pre-Mastering function which lets you
burn files directly from your hard drive, and supports Blu-ray format and
HD DVD.Compatible with all Windows 32 and 64 bit operating systems up
to Windows 7.
Home users make backup copies of their game CDs and movie DVDs*,
allowing the kids to treat multimedia disks roughly, without destroying their
value.
Librarians and school administrators use Alcohol 120% burning software to
archive their institutions' collections of recordable media, protecting themselves
against the daily wear and tear that damages discs.
Business users use Alcohol 120% burning software to make duplicate backup
copies of software titles, ensuring that they will continue to have access to their
licensed software, even if their physical CDs become damaged and unusable.
Alcohol 120% supports a wide range of CD/DVD image files including .mds,
.iso, .bwt, .b5t, .b6t, .ccd, .isz, .cue, .cdi, .pdi and .nrg formats.