Editing BeOS (section)

==Architecture==
[[File:beostru.PNG|thumb|The BeOS architecture]]
BeOS was developed as an original product, with a proprietary [[Kernel (operating system)|kernel]], [[symmetric multiprocessing]], [[preemptive multitasking]], and pervasive [[Multithreading (computer architecture)|multithreading]].<ref name=":1">{{cite web|url=https://www.gbnet.net/public/be/acrobat/AboutBe.pdf|title=Company Backgrounder|website=gbnet.net|access-date=13 March 2024}}</ref> It runs in [[protected memory]] mode, with a [[C++]] application framework based on shared libraries and modular code.<ref name=":4" /> Be initially offered [[CodeWarrior]] for application development,<ref name=":1" /> and later [[EGCS]].

Its [[API]] is [[object oriented]]. The user interface was largely multithreaded: each window ran in its own thread, relying heavily on sending messages to communicate between threads; and these concepts are reflected into the API.<ref name="openbox">{{cite magazine |last1=Potrebic |first1=Peter |last2=Horowitz |first2=Steve |date=January 1996 |title=Opening the BeBox |url=https://archive.org/details/eu_MacTech-1996-01_OCR/page/n26/mode/2up |magazine=[[MacTech]] |volume=12 |issue=1 |pages=25–45}}</ref>

BeOS uses modern hardware facilities such as modular I/O bandwidth, a multithreaded graphics engine (with the [[OpenGL]] library), and a [[64-bit]] [[journaling file system]] named [[Be File System|BFS]] supporting files up to one [[terabyte]] each.<ref name=":3" /> BeOS has partial [[POSIX]] compatibility and a [[command-line interface]] through [[Bash (Unix shell)|Bash]], although internally it is not a [[Unix]]-derived operating system. Many Unix applications were ported to the BeOS command-line interface.<ref>[[#Brown-1998|Brown (1998)]]</ref>

BeOS uses [[Unicode]] as the default GUI encoding, and support for input methods such as [[bidirectional text]] input was never realized.{{fact|date=March 2025}}