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Technical Requirements

To best view and use the sites, MIT OpenCourseWare has adopted the following guidelines:

  • Our course sites work on the Macintosh, Unix, and Windows platforms.
  • Although higher-speed connections are preferable, slower connections, such as 28.8 kbps modems, should allow users to view most materials on the sites; however, downloading materials will take a longer period of time.
  • Supported Browsers: MIT OCW has tested the course sites with the following browsers:
    • Internet Explorer version 6.0+  (Windows)
    • Safari version 1.2.2+  (Mac OSX)
    • Firefox 1.0+ (all platforms)
    • Mozilla 1.4+ (all platforms)
  • If you encounter difficulties, please contact MIT OCW with the feedback form.

Some special content filetypes require specialized software to use; an extensive list is included below:

File Types

Software Tool Suggestions

.asc

Any text editor can be used to view the .asc files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.avi

Media player software, such as QuickTime®Player, RealOne™ Player, or Windows Media®Player, is required to run the .avi files found on a course site.

.bat

Any text editor can be used to view the .bat files found on a course site. These files are also executable. Please refer to the course materials for any specific instructions or recommendations.

.bmp Any number of image viewers can be used to view the .bmp files found on a course site

.c

Any number of development tools can be used to compile and run the .c files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.cc

Any number of development tools can be used to compile and run the .cc files, C++ source code, found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.cif A standard filetype sponsored by IUCr, used by various software and tools.

.class

Java®Virtual Machine software (automatically installed in most major Web browsers) is required to run the .class files found on a course site.

.cnf

Any text editor can be used to view the .cnf files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.coor Any text editor can be used to view the .coor files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.csv

Any number of software tools can be used to import the .csv files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.ctd

MATLAB®software is required to make use of the .ctd files found on a course site.

NOTE: This is not a unique MATLAB extension. Please verify it is for use in MATLAB before using these statements.

.dat

Any number of software tools can be used to import the .dat files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.dbf ArcView software is required to open and work with .dbf files, although they can also be opened with Microsoft Excel software.
.dcd The DCD files are single precision binary FORTRAN files the format is supported by a wide range of analysis and display programs (such as VMD and NAMD).

.dcr

Shockwave®Player software is required to run the Shockwave® media found on a course site.

.dll

Any number of programs can call the .dll files found on a course site. These files are also executable. Please refer to the course materials for any specific instructions or recommendations.

.dict Any number of text editors can be used view the .dict files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.do

The STATA® statistical package is required to view and run the .do files found on a course site.

.ds

DataStudio ® Software is required to run the .ds files found on a course site.

.dta

The STATA® statistical package is required to view and run the .dta files found on a course site.

.eps

Ghostscript/Ghostview, Adobe®Photoshop®, and Adobe®Illustrator are among the software tools that can be used to view the .eps files found on a course site.

.exe

The .exe files found on a course site are executable programs. Please refer to the course materials for any specific instructions or recommendations.

.fa, .fas, .fasta

Any number of biological sequence comparison software tools can be used to import the FASTA formatted sequence (.fa) files found on a course site.

FEFLOW

FEFLOW software is required to complete work on a course site.

.fig

MATLAB®softwareis required to view and run the .fig files (MATLAB graphics files) found on a course site.

.fortran

Any number of development tools can be used to compile and run the .fortran files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.fna

Any number of biological sequence comparison software tools can be used to import the FASTA formatted sequence (.fna) files found on a course site.

.gph

The STATA® statistical package is required to view and run the .gph files found on a course site.

.gz

File decompression software, such as Winzip® or StuffIt®, is required to open the .gz files found on a course site.

.hs

Haskell compiler software is required to run the .hs files found on a course site.

.iv The ivview program from SGI Open Inventor toolkit is required to view the .iv files found on a course site.

.jar

Java®plug-in software is required to run the Java® files found on a course site.

.java

Any number of development tools can be used to compile and run the .java files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.jnlp

Java®Web Start software is required to run the Java® files found on a course site.

.lad

MATLAB®software is required to make use of the .lad files found on a course site.

NOTE: This is not a unique MATLAB extension. Please verify it is for use in MATLAB before using these statements.

.loc

MATLAB®software is required to make use of the .loc files found on a course site.

NOTE: This is not a unique MATLAB extension. Please verify it is for use in MATLAB before using these statements.

.m

MATLAB®software is required to run the .m files found on a course site. Additional toolbox plug-ins may also be required as noted on a course site.  Any text editor can be used to view the contents of the .m files found on a course site.

.mat

MATLAB®software is required to view and run the .mat files found on a course site.

.mcd

Mathcad®software is required to view and run the .mcd files found on a course site.

.mdb

Microsoft®Access software is recommended for viewing the .mdb files found on a course site. Free Microsoft®Access viewer software can also be used to view the .mdb files.

.mdl

MATLAB®software is required to run the .mdl files found on a course site.

.mf These are metafont text or source files. To use these files, you need a typesetting program that can read the font such as TeX or Metafont. Please refer to the course materials for any specific instructions or recommendations.

.mod

Any number of programs can be used to run the .mod files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.mov

QuickTime®Player software is required to view the .mov files found on a course site.

.movie

QuickTime®Player software is required to view the .movie files found on a course site.

.mp3

Media player software, such as QuickTime®Player, RealOne™ Player, or Windows Media®Player is required to run the .mp3 files found on a course site.

.mp4

The latest version of QuickTime®Player can be used to run the .mp4 files found on a course site.

.mpeg

Media player software, such as QuickTime®Player, RealOne™ Player, or Windows Media®Player is required to run the .mpeg files found on a course site.

.mph COMSOL MULTIPHYSICS™(formerly FEMLAB) is required to make use of the .mph files found on a course site.

.nb

Mathematica®software or the free MathReader software is required to run the .nb files found on a course site.

.p3

Primavera Project Planner® software is required to run the .p3 files on a course site.

.pdb

RasMol software is required to run the .pdb files found on a course site.

.pdb Protein Data Bank  viewer software can be used to view the .pdb protein data bank files found on a course site.

.pddl

Any text editor can be used to view the .pddl files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.pl

A Perl interpreter is required to run the .pl files found on a course site.

.ppt

Microsoft®Powerpoint® software is recommended for viewing the .ppt files found on a course site. Free Microsoft®Powerpoint® viewer software can also be used to view the .ppt files.

.ps

Postscript viewer software, such as Ghostscript/Ghostview, can be used to view the .ps files found on a course site.

.psf Any text editor can view these Protein Structure (.psf) files.  They are generated by VMD Molecular Graphics Viewer and can be used with NAMD (Molecular Dynamics Simulator).

.py

Use the Python interpreter to run the .py files found on a course site.

.qif

MATLAB®software is required to run the .qif files found on a course site.  Any text editor can be used to view the contents of the .qif files found on a course site.

.r

Use R, an open source language and development environment for statistical computing, graphics, and exploratory data analysis, to run the .r files found on a course site.

.ram

RealOne™Player software is required to run the .ram files found on a course site.

.rm

RealOne™ Player software is required to run the .rm files found on a course site.

.scm

Scheme software is required to run the .scm files found on a course site.

.sit Stuffit® is required to open the .sit files found on a course site.

.sldasm

SolidWorks®software is required to run and view the .sldasm files found on a course site.

.sldprt

SolidWorks®software is required to run and view the .sldprt files found on a course site.

.slogo

StarLogo software is required to run the .slogo files found on a course site.

.so

These are Unix shared library files. Any number of programs can call the .so files found on a course site. These files are also executable. Please refer to the course materials for any specific instructions or recommendations.

.spt

RasMol software is required to run the .spt files found on a course site.

.swf

Flash™Player software is required to run the Flash™ media found on a course site.

.swj

SolidWorks®software is required to run and view the .swj files found on a course site.

.tar

File decompression software, such as Winzip® or StuffIt®, is required to open the .tar files found on a course site.

.tex

Software to view the .tex files on this course site can be accessed via the Comprehensive TeX Archive Network (CTAN) and the TeX Users Group Web site.

.textgrid

Pratt software is needed to make use of these plain text files that accompany corresponding sound files.

.tif Any number of image viewers can be used to view the .tif files found on a course site.

.vsd

Microsoft®Visio®software is recommended for viewing the .vsd files found on a course site. Free Microsoft®Visio®viewer software can also be used to view the .vsd files.

.vss Microsoft®Visio®software is recommended for viewing the .vss stencil files found on a course site. Free Microsoft®Visio®viewer software can also be used to view the .vss files.
.vst Microsoft®Visio®software is recommended for viewing the .vst template files found on a course site. Free Microsoft®Visio®viewer software can also be used to view the .vst files.

.wav

Media player software, such as QuickTime®Player, RealOne™ Player, or Windows Media®Player is required to run the .wav files found on a course site.

.wcsp

Any text editor can be used to view the .wcsp files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.wk1 A Lotus123 worksheet that can be read directly intoMATLAB®.  Lotus 123 orMATLAB®software can be used to run the ..wk1 files found on a course site. Please refer to the course materials for any specific instructions or recommendations.
.wm

Working Model 2D is required to view and run the .wm files found on a course site.

.wmv

Media player software, such as RealOne™ Player, or Windows Media®Player is required to run the .wmv files found on a course site.

.x

Any number of development tools can be used to run the .x files found on a course site. Please refer to the course materials for any specific instructions or recommendations.

.xls

Microsoft®Excel software is recommended for viewing the .xls files found on a course site. Free Microsoft®Excel viewer software can also be used to view the .xls files.

.xmcd

Mathcad®software is required to view and run the .xmcd files found on a course site.

.xml

Any text editor can be used to view the .xml files found on a course site.

.xsl

Any text editor can be used to view the .xsl files found on a course site.

.xyz VMD (Molecular Graphics Viewer) is used to to view and use .xyz files foudn on a course site.

.zip

File decompression software, such as Winzip® or StuffIt®, is required to open the .zip files found on a course site.