Microsoft Binary Format

In computing, Microsoft Binary Format (MBF) was a format for floating point numbers used in Microsoft's BASIC language products including MBASIC, GW-BASIC and QuickBasic prior to version 4.00.

History

In 1975, Bill Gates and Paul Allen were working on Altair BASIC, which they were developing at Harvard University on a PDP-10 running their Altair emulator. One thing still missing was code to handle floating point numbers, needed to support calculations with very big and very small numbers, which would be particularly useful for science and engineering. One of the proposed uses of the Altair was as a scientific calculator.

At a dinner at Courier House, an undergraduate residential house at Harvard, Gates and Allen complained to their dinner companions about having to write this code. One of them, Monte Davidoff, told them he had written floating point routines before and convinced Gates and Allen that he was capable of writing the Altair BASIC floating point code. At the time there was no standard for floating point numbers, so Davidoff had to come up with his own. He decided 32 bits would allow enough range and precision. When Allen had to demonstrate it to MITS, it was the first time it ran on an actual Altair. But it worked and when he entered ‘PRINT 2+2’, Davidoff's adding routine gave the right answer.

DSB (railway company)

DSB, an abbreviation of Danske Statsbaner (Danish State Railways), is the largest Danish train operating company, and the largest in Scandinavia. While DSB is responsible for passenger train operation on most of the Danish railways, goods transport and railway maintenance are outside its scope. DSB runs a commuter rail system, called S-train, in the area around the Danish capital, Copenhagen, that connects the different areas and suburbs in the greater metropolitan area. DSB also operates some trains in Sweden.

DSB was founded in 1885 when the state-owned companies De jysk-fynske Statsbaner and De sjællandske Statsbaner merged.

History

The first railways in Denmark were built and operated by private companies. The railways in Funen and Jutland were built by Peto and Betts who also supplied the locomotives (built by Canada Works, Birkenhead). Most of the technical staff was also recruited from Britain, notably from the Eastern Counties Railway. When Peto and Betts went into insolvency, the Danish state took over Det danske Jernbane-Driftsselskab (The Danish Railway Operating Company) as of September 1, 1867 under the name De jysk-fyenske Jernbaner (the Funen and Jutland Railways), from 1874 De danske Statsbaner i Jylland og Fyn (The Danish State Railways in Jutland and Funen). The network was extended by new construction and by acquisition of the privately operated lines from Silkeborg to Herning (November 1, 1879) and from Grenaa to Randers and Aarhus (April 1, 1881).

Class (education)

A class in education has a variety of related meanings.

It can be the group of students which attends a specific course or lesson at a university, school, or other educational institution, see Form (education).

It can refer to a course itself, e.g., a class in Shakespearean drama.

It can be the group of students at the same level in an institution: the freshman class; or the group of students which graduates from the institution at the same time: the Class of 2005 (cf. alumnus/a). The term can be used in a slightly more general context, such as "the graduating class."

It can also refer to the classroom, in the building or venue where such a lesson is conducted.

In some countries' educational systems (such as Taiwan's), it can refer to a subdivision of the students in an academic department, consisting of a cohort of students of the same academic level. For example, a department's sophomores may be divided into three classes.

In countries such as the Republic of Ireland, India, Germany, and in the past Sweden, the word can mean a grade: 1st class is ages 4–5, 2nd class is ages 6–7, 3rd class is ages 8–9, 4th class is ages 9–10, 5th class is ages 10–11, 6th class is ages 11–12, and 9th class is ages 14–15.

Social class

Social class (or simply "class"), as in a class society, is a set of concepts in the social sciences and political theory centered on models of social stratification in which people are grouped into a set of hierarchical social categories, the most common being the upper, middle, and lower classes.

Class is an essential object of analysis for sociologists, political scientists, anthropologists, and social historians. However, there is not a consensus on the best definition of the "class," and the term has different contextual meanings. In common parlance, the term "social class" is usually synonymous with "socio-economic class," defined as "people having the same social, economic, or educational status," e.g., "the working class"; "an emerging professional class." However, academics distinguish social class and socioeconomic status, with the former referring to one’s relatively stable sociocultural background and the latter referring to one’s current social and economic situation and, consequently, being more changeable over time.

New South Wales 85 class locomotive

The New South Wales 85 class were a class of 10 electric locomotives built by Comeng, Granville between May 1979 and July 1980 for the Public Transport Commission.

When introduced they were the most powerful locomotives in Australia with a rating of 2,880 kW. Based at Lithgow depot they were purchased principally to haul coal trains over the Blue Mountains line. They also hauled other freight trains and on occasions passenger services including the Indian Pacific.

Following the Illawarra line being electrified in 1986, 85s began to operate coal trains from Lithgow through to Port Kembla. They also occasionally hauled coal services from Glenlee Colliery on the Main South line to Port Kembla and Rozelle. They did not operate on the Main North line although in 1993 all were hauled to Taree for repainting at Landsdowne Engineering.

A combination of National Rail electing to use diesel locomotives on electrified lines and a move to an open access model in New South Wales resulting in electric traction being priced out of the market saw the need for electric traction drop. In April 1998, the 85 class were withdrawn and stored at Lithgow.