AOS

AoS or AOS may refer to:

Military, police and government

Schools and education

Science and academia

Data General AOS

AOS was the name of a family of operating systems for Data General 16-bit Eclipse C, M, and S minicomputers, followed by AOS/VS and AOS/RT32 (1980) and later AOS/VS II (1988) for the 32-bit Eclipse MV line.

AOS/VS exploited the 8-ring protection architecture of the Eclipse MV hardware with ring 7 being the least privileged and ring 0 being the most privileged. The AOS/VS kernel ran in ring 0 and used ring-1 addresses for data structures related to virtual address translations. Ring 2 was unused and reserved for future use by the kernel. The Agent, which performed much of the system call validation for the AOS/VS kernel, as well as some I/O buffering and many compatibility functions, ran in ring 3 of each process. Ring 4 was used by various D.G. products such as the INFOS II DBMS. Rings 5 and 6 were reserved for use by user programs but rarely used except for large software such as the MV/UX inner-ring emulator and Oracle which used ring 5. All user programs ran in ring 7.

Calculator input methods

There are various ways in which calculators interpret keystrokes.

One can categorize calculators into two main types: 1) single-step or immediate execution calculators and 2) expression or formula calculators.

On a formula calculator one types in an expression and then presses 'Enter' to evaluate the expression. There are various systems for typing in an expression: infix, postfix, natural display, etc.

On an immediate execution calculator, the user presses a key for each operation, by pressing keys to calculate all the intermediate results, before the final value is shown.

Immediate execution

With the immediate execution mode (also known as algebraic entry system (AES) or chain calculation mode) of operation each binary operation is executed as soon as the next operator is pressed, therefore the order of operations in a mathematical expression is not taken into account. Scientific calculators have buttons for brackets and these calculators can take order of operation into account. Also for unary operations like √ or x² the number is entered first then the operator. Simple four-function calculators, such as those included with most operating systems, usually use this input method.

HEA

HEA may refer to:

Craig

Places

In Scotland:

In the United States:

Geology

People

Fictional characters

Crag and tail

A crag (sometimes spelled cragg, or in Scotland craig) is a rocky hill or mountain, generally isolated from other high ground. Crags are formed when a glacier or ice sheet passes over an area that contains a particularly resistant rock formation (often a granite, volcanic plug or some other volcanic structure). The force of the glacier erodes the surrounding softer material, leaving the rocky block protruding from the surrounding terrain. Frequently the crag serves as a partial shelter to softer material in the wake of the glacier, which remains as a gradual fan or ridge forming a tapered ramp (called the tail) up the leeward side of the crag.

In older examples, or those latterly surrounded by the sea, the tail is often missing, having been removed by post-glacial erosion.

Examples of such crag and tail formations include:

List of American Horror Story characters

American Horror Story is an American horror television series created and produced by Ryan Murphy and Brad Falchuk. Described as an anthology series, each season is conceived as a self-contained miniseries, following a disparate set of characters, settings, and a storyline with its own beginning, middle, and end. However, Murphy has stated that all of the seasons are and will be connected by the end of the series.

The first season, subtitled Murder House, takes place during 2011 in Los Angeles, California and centers on a family that moves into a house haunted by its deceased former occupants. The second season, subtitled Asylum, takes place during 1964 in Massachusetts and follows the stories of the inmates and staff of an institution for the criminally insane. The third season, subtitled Coven, takes place during 2013 in New Orleans, Louisiana and follows a coven of witches who face off against those who wish to destroy them. The fourth season, subtitled Freak Show, takes place during 1952 in Jupiter, Florida and focuses on one of the last remaining freak shows in America and its struggle to survive. The fifth season, subtitled Hotel, takes place during 2015 in Los Angeles, California and centers on the unusual occurrences and people of a mysterious and outdated hotel.