Epsilon is a
programmer
A computer programmer, sometimes referred to as a software developer, a software engineer, a programmer or a coder, is a person who creates computer programs — often for larger computer software.
A programmer is someone who writes/creates ...
's
text editor
A text editor is a type of computer program that edits plain text. Such programs are sometimes known as "notepad" software (e.g. Windows Notepad). Text editors are provided with operating systems and software development packages, and can be us ...
modelled after
Emacs
Emacs , originally named EMACS (an acronym for "Editor MACroS"), is a family of text editors that are characterized by their extensibility. The manual for the most widely used variant, GNU Emacs, describes it as "the extensible, customizable, s ...
. It resembles Emacs not only in its default keybindings and layout, but also in the fact that it has a
Turing-complete
In computability theory, a system of data-manipulation rules (such as a computer's instruction set, a programming language, or a cellular automaton) is said to be Turing-complete or computationally universal if it can be used to simulate any Tur ...
extension language in which much of its functionality is implemented. Unlike Emacs, Epsilon's extension language, EEL (Epsilon Extension Language)
Lugaru.com
/ref> is a dialect of C rather than a dialect of Lisp
A lisp is a speech impairment in which a person misarticulates sibilants (, , , , , , , ). These misarticulations often result in unclear speech.
Types
* A frontal lisp occurs when the tongue is placed anterior to the target. Interdental lisping ...
. Epsilon runs on DOS, Microsoft Windows
Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...
, Linux
Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...
, FreeBSD
FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular ...
, Mac OS X
macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac (computer), Mac computers. Within the market of ...
and OS/2.
Epsilon is a commercial product sold by Lugaru Software. It was first released in 1984, long before Emacs was available on personal computers, and it provided an attractive alternative to the usual DOS editors for those accustomed to Emacs. It was also the first DOS based editor to allow editing of files that were larger than available RAM, and one of the first to allow running programs (such as compilers) in the background while allowing editing to proceed concurrently on DOS.Unicode
Unicode, formally The Unicode Standard,The formal version reference is is an information technology Technical standard, standard for the consistent character encoding, encoding, representation, and handling of Character (computing), text expre ...
but does not display characters outside the BMP and cannot presently handle right-to-left scripts. It can convert among dozens of character encodings.
Reception
''BYTE
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit ...
'' in 1989 listed Epsilon as among the "Distinction" winners of the BYTE Awards, especially praising EEL.
References
External links
Epsilon homepage
Emacs
DOS text editors
{{Text-editor-stub