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Most portable applications do not leave files or settings on the host computer or modify the existing system and its configuration. The application may not write to the Windows registry [3] or store its configuration files (such as an INI file) in the user's profile, but today, many portables do; many, however, still store their configuration files in the portable directory.
The Multics shell includes a run command to run a command in an isolated environment. [1] The DEC TOPS-10 [2] and TOPS-20 [3] Command Processor included a RUN command for running executable programs. In the BASIC programming language, RUN is used to start program execution from direct mode, or to start an overlay program from a loader program.
An installation program or installer is a computer program that installs files, such as applications, drivers, or other software, onto a computer. Some installers are specifically made to install the files they contain; other installers are general-purpose and work by reading the contents of the software package to be installed.
Turbo Studio [3] (formerly Spoon Studio and Xenocode Virtual Application Studio) is an application virtualization tool that runs on Microsoft Windows. The tool packages software applications into portable applications; these single executable files can be run instantly on any Windows computer.
Such web applications must, for security reasons, have limited control over the host computer, especially regarding reading and writing files. Non-web programs, installed upon a computer in the normal manner, can have more control, and yet achieve system portability by linking to portable libraries providing the same interface on different systems.
A computer program is a sequence or set [a] ... would write a program and run it. ... and delete files. The kernel program should perform device management. ...
A software package is an archive file containing a computer program as well as necessary metadata for its deployment. The computer program can be in source code that has to be compiled and built first. [6] Package metadata include package description, package version, and dependencies (other packages that need to be installed beforehand).
To create a portable app, run the setup file, and install the program a suitable location in the hard drive. Then copy the folder made by the setup file into the external drive. Then uninstall the original file, You will now have a portable app. This won't work for all programs, but it will work for most of them. This last comment is pure rubbish.