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AT Computing profile

AT Computing is a training company, specialised in UNIX and Linux training at all levels, with courses for end-users, system administrators, and security administrators. Application programmers courses cover the C, C++, Python, Go, PHP, Perl, and JavaScript languages.

The Linux and UNIX experts

The founders of AT Computing were the very first UNIX users in The Netherlands, over four decades ago. Since then, they closely followed the path that this system has taken, including the very early adoption of the (predecessor of the) Internet infrastructure in The Netherlands around 1985. The World Wide Web developed almost a decade later, around 1995, and AT Computing became the first commercial company in The Netherlands to have a company website. No other company in The Netherlands has so many honorary members of the NLUUG, the Dutch UNIX System Users Association, among its staff.

AT Computing was involved in the development, maintenance and adaptation of Open Source software long before this term was coined as such. The Linux system, as a new member of the UNIX family, was embraced already in its earliest days in 1993. This way, a unique body of deeply founded technical knowledge has developed, with which AT Computing rightfully calls itself the Linux and UNIX expert in the Dutch market.

Our course teachers are well geared towards the theoretical and practical aspects of Linux and UNIX. The teachers have a full-time Linux/UNIX related profession, they follow all developments at close distance, and they thoroughly enjoy working with the system. Their knowledge of the technical facts is complemented with their tremendous feeling for "the UNIX way". This allows them to pass on their knowledge and their experience to their students in a succesful way.

AT Computing: a closer look

AT Computing specialises in course training, with an emphasis on UNIX, Linux, programming languages and IP networks.

The company started in 1985 as a spin-off from the Science Faculty of the Radboud University. in Nijmegen, NL. Initially all courses were focussed on knowledge transfer on the UNIX system, but gradually the product range expanded towards various platform independent topics.

AT Computing has teaching facilities in the cities of Nijmegen, its home town near the German border, and in Utrecht, centrally located in The Netherlands. All courses can be presented in-company, anywhere within the European Union. Several fully mobile course room outfits are available, including all necessary computer equipment and teaching aids.

AT Computing does not sell any hardware or software products, and as such maintains a fully independent position in the market. Our course material is developed in-house, occasionally supplemented by selected text books. This way an objective and unbiased presentation is guaranteed.

UNIX and Linux

Several commercial vendors offer "a UNIX" in the market place: IBM (AIX), Hewlett Packard (HP/UX), Oracle/Sun (Solaris), Apple (MacOS X) etc. The word 'UNIX' is a generic designation, comparable to the word 'car'.

Open Source members play a steadily increasing role within the family: a number of BSD (Berkeley Software Distribution) implementations, and of course Linux. From a technical point of view, the distinction of "UNIX" on one side, and "Linux" on the other, is unjustified: Linux may very well be considered to be a key member within the UNIX family.

The UNIX Operating System(s)

UNIX is an operating system for computers, initially developed by Bell Laboratories from 1969 on. All current members of the UNIX family are either evolutionary descendents of this, or, like Linux, re-implementations based on extensive standards derived from the original design of UNIX.

Because of its simplicity, flexibility and modular structure it is well adapted to a range of applications: software development, process control, and network management: the wave with which the Internet took the world was powered by a technical infrastructure of UNIX machines! The majority of all web servers in the world is UNIX-based, as is the majority of all supercomputers for technical and scientific calculations. Companies like Google are almost entirely based on UNIX-technology. An ever increasing choice of desktop applications even makes it a viable alternative for competing desktop systems.

A major argument in favor of UNIX is that it makes well written application software sources independent of any particular vendor. Nor the supplier of your operating system, nor the manufacturer of your CPU chip, can single handedly force you to enter an alley that you rather would like to see different. And, as an added bonus: stability and network safety of UNIX systems are undisputed. Forget about your virus scanner!

Linux as a member of the UNIX family

From 1991 on, Linus Torvalds reimplemented the UNIX-design, based on the POSIX standardised specification, and augmented it with the vast software resources from the GNU project of the Free Software Foundation. From that moment on, Linux has been a steadily growing force, supported and expanded by an enormous crowd of contributors from all over the world.

Notable contributions are the OpenOffice and LibreOffice Suites, which rival competing office software running on other operating systems, and the Apache web server software, which fuels the majority of all web server computers on the Internet.

Torvalds, and a small group of his trustees, still guard the developments of the Linux kernel in person. Companies such as RedHat, SUSE, Canonical/Ubuntu and many more, combine this kernel with the myriads of contributions, and sell that as a package which is easy to install, and then ready to use. Apart from the moderate purchase costs of such a package, there are no licensing costs involved, and unlimited copying is permitted for free.

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