Timeline
Overview
 
A timeline is a way of displaying a list of events in chronological order, sometimes described as a project artifact . It is typically a graphic design showing a long bar labeled with dates alongside itself and (usually) events labeled on points where they would have happened.
Timelines are often used in education
Education
Education in its broadest, general sense is the means through which the aims and habits of a group of people lives on from one generation to the next. Generally, it occurs through any experience that has a formative effect on the way one thinks, feels, or acts...

 to help students and researchers with understanding events and trends for a particular subject.
Timelines are particularly useful for studying science, as they convey a sense of change over time.
Encyclopedia
A timeline is a way of displaying a list of events in chronological order, sometimes described as a project artifact . It is typically a graphic design showing a long bar labeled with dates alongside itself and (usually) events labeled on points where they would have happened.

Uses of timelines

Timelines are often used in education
Education
Education in its broadest, general sense is the means through which the aims and habits of a group of people lives on from one generation to the next. Generally, it occurs through any experience that has a formative effect on the way one thinks, feels, or acts...

 to help students and researchers with understanding events and trends for a particular subject.

History

Timelines are particularly useful for studying science, as they convey a sense of change over time. Wars and social movements are often shown as timelines. Timelines are also useful for biographies
Biography
A biography is a detailed description or account of someone's life. More than a list of basic facts , biography also portrays the subject's experience of those events...

.
Examples include:
  • Chronology of Shakespeare's plays
  • Timeline of the African-American Civil Rights Movement
  • Timeline of European exploration
    Timeline of European exploration
    The following timeline covers European exploration from 1418 to 1948.The fifteenth century witnessed the rounding of the feared Cape Bojador and Portuguese exploration of the west coast of Africa, while in the last decade of the century the Spanish sent expeditions to the New World, focusing on...

  • Timeline of Solar System exploration
    Timeline of solar system exploration
    This is a timeline of Solar System exploration ordered by date of spacecraft launch. It includes:*All spacecraft that have left Earth orbit for the purposes of Solar System exploration , including lunar probes....

  • Timeline of United States history (1930–1949)
  • World War I timeline
    World War I timeline
    The following tables list the main events which happened during World War I.-1914:-1915:-1916:-1917:-1918:-1919:-1920:-Post-1920:-References:* * * * * * * *...


Natural sciences

Timelines are also used in the natural world and sciences for subjects such as astronomy
Astronomy
Astronomy is a natural science that deals with the study of celestial objects and phenomena that originate outside the atmosphere of Earth...

, biology
Biology
Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines...

 and geology
Geology
Geology is the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which it evolves. Geology gives insight into the history of the Earth, as it provides the primary evidence for plate tectonics, the evolutionary history of life, and past climates...

.
  • 2009 H1N1 Flu Pandemic Timeline
    2009 flu pandemic timeline
    This article covers the chronology of the 2009 novel influenza A pandemic. Flag icons denote the first announcements of confirmed cases by the respective nation-states, their first deaths , and relevant sessions and announcements of the World Health...

  • Geologic time scale
    Geologic time scale
    The geologic time scale provides a system of chronologic measurement relating stratigraphy to time that is used by geologists, paleontologists and other earth scientists to describe the timing and relationships between events that have occurred during the history of the Earth...

  • Timeline of the Big Bang
  • Timeline of Evolution
    Timeline of evolution
    This timeline of evolution of life outlines the major events in the development of life on planet Earth since it first originated until the present day. In biology, evolution is any change across successive generations in the heritable characteristics of biological populations...


Project management

Another type of timeline is used for project management
Project management
Project management is the discipline of planning, organizing, securing, and managing resources to achieve specific goals. A project is a temporary endeavor with a defined beginning and end , undertaken to meet unique goals and objectives, typically to bring about beneficial change or added value...

. In these cases, timelines are used to help team members to know what milestones need to be achieved and under what time schedule. For example in the case of establishing a project timeline in the implementation phase of the life cycle of a computer system.

Time scale

Timelines can take use any time scale, depending on the subject and data. Most timelines use a linear scale, where a unit of distance is equal to a set amount of time. This time scale is dependent on the events in the timeline. A timeline of evolution
Timeline of evolution
This timeline of evolution of life outlines the major events in the development of life on planet Earth since it first originated until the present day. In biology, evolution is any change across successive generations in the heritable characteristics of biological populations...

 can be over millions of years, whereas a timeline about the September 11, 2001
September 11, 2001 timeline for the day of the attacks
The September 11 attacks, in addition to being a unique act of aggression, constituted a media event on a scale not seen since the advent of civilian global satellite links, round-the-clock television news organizations and the instant worldwide reaction and debate made possible by the Internet...

 can take place over minutes. While most timelines use a linear timescale, for very large or small timespans, logarithmic timeline
Logarithmic timeline
A logarithmic timeline is a timeline laid out according to a logarithmic scale. This necessarily implies a zero point and an infinity point, neither of which can be displayed. The most natural zero point is the Big Bang, looking forward, but the most common is the ever-changing present, looking...

s use a logarithmic scale to depict time.

Types of timelines

There are many methods of visualizations for timelines. Historically, timelines were static images, and generally drawn or printed on paper. Timelines relied heavily on graphic design
Graphic design
Graphic design is a creative process – most often involving a client and a designer and usually completed in conjunction with producers of form – undertaken in order to convey a specific message to a targeted audience...

, and the ability of the artist to visualize the data. Minard
Charles Joseph Minard
Charles Joseph Minard was a French civil engineer noted for his inventions in the field of information graphics.- Biography :...

's map (1861) of Napoleon's invasion of Russia is an example of a non-standard timeline that also uses geography as part of the visualization.

Timelines, no longer constrained by previous space and functional limitations, are now digital and interactive, generally created with computer software.

See also

  • Chronology
    Chronology
    Chronology is the science of arranging events in their order of occurrence in time, such as the use of a timeline or sequence of events. It is also "the determination of the actual temporal sequence of past events".Chronology is part of periodization...

  • Detailed logarithmic timeline
    Detailed logarithmic timeline
    This timeline allows one to see the whole history of the universe, the Earth, and mankind in one table.Each row is defined in years ago, that is, years before the present date, with the earliest times at the top of the chart...

  • List of timelines
  • Living graph
    Living graph
    In terms of knowledge representation, a living graph is a graph similar to a chronology timeline which places events along a vertical axis to reflect changes over time. The vertical axis can be used to represent many factors, such as relative importance, degrees of success/failure, danger/safety...

  • Logarithmic timeline
    Logarithmic timeline
    A logarithmic timeline is a timeline laid out according to a logarithmic scale. This necessarily implies a zero point and an infinity point, neither of which can be displayed. The most natural zero point is the Big Bang, looking forward, but the most common is the ever-changing present, looking...

  • Sequence of events
  • SIMILE
    SIMILE
    SIMILE is a joint research project run by the World Wide Web Consortium , Massachusetts Institute of Technology Libraries and CSAIL and funded by the Andrew W. Mellon Foundation...

  • Synchronoptic view
    Synchronoptic view
    A synchronoptic view is a graphic display of a number of entities as they proceed through time. A synchronoptic view can be used for many purposes but is best suited to the visual display of history...

  • Timeline of world history
    Timeline of world history
    The timeline of world history details recorded events since the creation of writing roughly 5000 years ago to the present day.*For events from ≈3350 BCE to ≈500 CE see: Timeline of ancient history...



External links

  • Timelines: sources from history a British Library interactive history timeline that explores collection items chronologically, from medieval times to the present day
  • ChronoZoom is a timeline for Big History
    Big History
    Big History is a field of historical study that examines history on large scales across long time frames through a multidisciplinary approach, focusing on both the history of the non-human world and on major adaptations and alterations in the human experience...

     being developed for the International Big History Association by Microsoft Research
    Microsoft Research
    Microsoft Research is the research division of Microsoft created in 1991 for developing various computer science ideas and integrating them into Microsoft products. It currently employs Turing Award winners C.A.R. Hoare, Butler Lampson, and Charles P...

     and University of California, Berkeley
    University of California, Berkeley
    The University of California, Berkeley , is a teaching and research university established in 1868 and located in Berkeley, California, USA...

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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