Leopard dropped support for the Classic Environment and all Classic applications.

There was discussion of implementing a ' transparent blue box ' which would intermix Mac OS applications with those written for Rhapsody's Yellow Box environment, but this would not happen until Mac OS X's Classic environment.

Classic, or Classic Environment, is a hardware and software abstraction layer in early versions of Mac OS X that allows applications compatible with Mac OS 9 to run on the Mac OS X operating system.

The name " Classic " is also sometimes used by software vendors to refer to the application programming interface available to " classic " applications, to differentiate between programming for Mac OS X and the previous version of the Mac OS.

This sandbox is used to launch all " classic " Mac OS applications — there is only one instance of the Classic process running for a given user, and only one user per machine may be running Classic at a time.

The Classic Environment provides a way to run " Classic " applications on Apple's G5 systems as well as on most G4 based computers sold after September 2002.

Early releases of Mac OS X 10. 2 would often fail to draw window frames of Classic applications correctly, and after Classic windowing was made double buffered in Mac OS X v10. 3, some older applications and games sometimes failed to update the screen properly, such as the original Macintosh port of Doom.

However, Classic " resurrected " some older applications that had previously been unusable on the Macintosh Quadra and Power Macintosh series ; this is because Mac OS X replaced Mac OS 9's virtual memory system with a more standard and less fragile implementation.

Classic examples of photoconductive materials include the conductive polymer polyvinylcarbazole, used extensively in photocopying ( xerography ); lead sulfide, used in infrared detection applications, such as the U. S. Sidewinder and Russian Atoll heat-seeking missiles ; and selenium, employed in early television and xerography.

Apple chose to use this model for a variety of reasons, including the avoidance of high Adobe-imposed licensing fees for DPS, and more efficient support of legacy Carbon and Classic code ; QuickDraw-based applications use bitmapped drawing exclusively.

" Sue Talley, Apple's manager of strategic planning in education, said of the Classic: " we see it going into applications where you need a fair number of powerful stations, but where color is not a big issue.

Classic 68k applications are one example, where even the executable code is contained in resources of type ‘ CODE ’.

The higher-grade versions ( see Versions, below ), allow applications to be compiled to run on more than one platform, including Macintosh ( Classic or Mac OS 9, and Mac OS X ), Windows and Unix-like systems including Linux.

Classic Desk Accessories also served as small programs available while running other applications, but they used the text screen and could be accessed even from non-desktop applications.

Panther still supported the Classic environment fully for running older Mac OS 9 applications but made Classic application windows double-buffered, which interfered with some applications expecting to directly draw to the screen.

The title Daodejing is an honorific given by posterity, other titles include the amalgam Lǎozǐ Dàodéjīng ( 老子道德經 ), the honorific Daode Zhen Jing ( 道德真經 " True Classic of the Way and the Power "), and the Wuqian wen ( " Five thousand character ").

Classic uses include a sense of balance in numerous games, where each person has found or developed a tactic that cannot successfully better his results, given the other approach.

Classic works of this Urban Gothic include Robert Louis Stevenson's Strange Case of Dr Jekyll and Mr Hyde ( 1886 ), Oscar Wilde's The Picture of Dorian Gray ( 1891 ), George du Maurier's Trilby ( 1894 ), Richard Marsh's The Beetle: A Mystery ( 1897 ), Henry James ' The Turn of the Screw ( 1898 ), and the stories of Arthur Machen.

Classic examples of reversed sex-role species include the pipefish, and Wilson's phalarope.

Classic 2D graphics chips of the late 1970s and early 1980s, used in the 8-bit video game consoles and home computers, include:

Classic symptoms of hypomania include mild euphoria, a flood of ideas, seemingly endless energy, and a desire and drive for success.

Classic examples of parasitism include interactions between vertebrate hosts and diverse animals such as tapeworms, flukes, the Plasmodium species, and fleas.

Oval or elongated oval-shaped and black-skinned cultivars include ' Harris Special Hibush ', ' Burpee Hybrid ', ' Black Magic ', ' Classic ', ' Dusky ', and ' Black Beauty '.

Classic domains where PDEs are used include acoustics, fluid flow, electrodynamics, and heat transfer.

** The Thousand Character Classic is a one-thousand-character poem in which each character is used exactly once, but it does not include all Chinese characters.

Classic Situationist texts include: On the Poverty of Student Life, Society of the Spectacle by Guy Debord, and The Revolution of Everyday Life by Raoul Vaneigem.

Recent retrospective surveys include " All About Art ," Louisiana Museum, Humelbaek ( 2003, traveled to the Hayward Gallery, London, Museo Reina Sofia, Madrid, and the San Francisco Museum of Modern Art through 2005 ); and " Classic of the New ", Kunsthaus Bregenz ( 2005 ), " Roy Lichtenstein: Meditations on Art " Museo Triennale, Milan ( 2010, traveled to the Museum Ludwig, Cologne ).

Classic bush songs on such themes include: The Wild Colonial Boy, Click Go The Shears, The Eumeralla Shore, The Drover's Dream, The Queensland Drover, The Dying Stockman and Moreton Bay.

Classic programs include the Electric Power Research Institute's ( EPRI ) CAFTA software, which is used by many of the US nuclear power plants and by a majority of US and international aerospace manufacturers, and the Idaho National Laboratory's SAPHIRE, which is used by the U. S. Government to evaluate the safety and reliability of nuclear reactors, the Space Shuttle, and the International Space Station.

Classic examples of " boy bands " include Menudo, New Kids on the Block, Backstreet Boys, ' N Sync, and The Spice Girls all becoming the best selling pop groups of the decade and are often cited as the pioneers that paved the way for the commercial breakthrough of teen pop in the late 1990s.

Classic examples of Chinese manufacturing are displayed which include lacquer, silk, porcelain, jade and cloisonné enamel.

Compilations that include the game are Sonic Jam ( 1997 ) for the Sega Saturn ; Sonic & Knuckles Collection ( 1997 ) and Sonic & Garfield Pack ( 1999 ) for the PC, Sonic Mega Collection ( 2002 ) for the Nintendo GameCube ; Sonic Mega Collection Plus ( 2004 ) for the PlayStation 2, Xbox and PC ; Sega Genesis Collection ( 2006 ) for the PlayStation 2 and PlayStation Portable ; Sonic's Ultimate Genesis Collection ( 2009 ) for the Xbox 360 and PlayStation 3 ; and Sonic Classic Collection ( 2010 ) for the Nintendo DS.

Annual events in Menard include Jim Bowie Days, held in late June, the Jim Bowie Trail Ride in September, and the Silver Mine Classic Lamb Show in October.

Activities at Starvation Reservoir include the annual Starvation Walleye Classic and Desert Bass Busters Club Tourny.

Classic examples of the memento pattern include the seed of a pseudorandom number generator ( it will always produce the same sequence thereafter when initialized with the seed state ) and the state in a finite state machine.

Important Daoist classics include the Dao De Jing, the Zhuangzi, and the Classic of the Perfect Emptiness.

Classic sponsors include Siemens, Burger King, Ebel, Fitness First, The LEGO Group, Schaeffler Group, s. Oliver, Continental, Viagogo, Trentino, Thomas Sabo and Sheraton Hotels and Resorts.

Mass-manufactured motor tricycles include the Piaggio MP3 ; the Piaggio Ape ( Italian for Bee ) delivery trike ( delta ); the Harley-Davidson Tri Glide Ultra Classic ; the Bombardier Recreational Products Can-Am Spyder ( tadpole ); the T-Rex reverse trike ; trikes used by municipal authorities in the USA ; and, historically, vehicles such as the Scammell Scarab railway dray, a common sight around post-war British railway stations.

In mathematics, particularly in differential geometry and global analysis, spinors have since found broad applications to algebraic and differential topology, symplectic geometry, gauge theory, complex algebraic geometry, index theory, and special holonomy.

* Ronald Brown, " Groupoids and crossed objects in algebraic topology Homology, homotopy and applications 1 ( 1999 ) 1-78.

These stability properties make them inevitable in homological algebra and beyond ; the theory has major applications in algebraic geometry, cohomology and pure category theory.

The snake lemma is valid in every abelian category and is a crucial tool in homological algebra and its applications, for instance in algebraic topology.

Over the next 10-odd years, Grassmann wrote a variety of work applying his theory of extension, including his 1845 Neue Theorie der Elektrodynamik and several papers on algebraic curves and surfaces, in the hope that these applications would lead others to take his theory seriously.

Due to their general nature and versatility, sheaves have several applications in topology and especially in algebraic and differential geometry.

Note also that although applications almost always deal with convergence of sequences, the statement is purely algebraic and will work in any field.

In abstract algebra, homological algebra, algebraic topology and algebraic number theory, as well as in applications to group theory proper, group cohomology is a way to study groups using a sequence of functors H < sup > n </ sup >.

The theory of integral quadratic forms in n variables has important applications to algebraic topology.

Tensor fields are used in differential geometry, algebraic geometry, general relativity, in the analysis of stress and strain in materials, and in numerous applications in the physical sciences and engineering.

Some striking applications of ultraproducts include very elegant proofs of the compactness theorem and the completeness theorem, Keisler's ultrapower theorem, which gives an algebraic characterization of the semantic notion of elementary equivalence, and the Robinson-Zakon presentation of the use of superstructures and their monomorphisms to construct nonstandard models of analysis, leading to the growth of the area of non-standard analysis, which was pioneered ( as an application of the compactness theorem ) by Abraham Robinson.

* Ronald Brown, ` Groupoids and crossed objects in algebraic topology ', Homology, homotopy and applications, 1 ( 1999 ) 1 – 78.

Because the classical synthesis methods ( algebraic, i. e. projection-based synthesis ), yielding only uniform DPU arrays permitting only linear pipes, systolic arrays could be used only to implement applications with regular data dependencies.

Since algebraic extensions of fields of characteristic zero, and of finite fields, are separable, separability is not an obstacle in most applications of Galois theory.

Although many important applications of the theory of separable extensions stem from the context of algebraic field extensions, there are important instances in mathematics where it is profitable to study ( not necessarily algebraic ) separable field extensions.

Solomon Lefschetz (; 3 September 1884 – 5 October 1972 ) was an American mathematician who did fundamental work on algebraic topology, its applications to algebraic geometry, and the theory of non-linear ordinary differential equations.

Kähler manifolds find important applications in the field of algebraic geometry where they represent generalizations of complex projective algebraic varieties via the Kodaira embedding theorem.

Such groups were known for a long time before their abstract algebraic theory was developed according to the needs of major applications.

In applications to algebraic geometry over a finite field F < sub > q </ sub >, the main objective was to find a replacement for the singular cohomology groups with integer ( or rational ) coefficients, which are not available in the same way as for geometry of an algebraic variety over the complex number field.