Taxus Baccata

Isis most commonly refers to the Egyptian goddess Isis, or as an acronym for the Islamic State of Iraq and Syria (ISIS).

Isis or ISIS may also refer to:

Computing

ISIS (operating system), used on the Intel 8085 processor
CDS ISIS, a non-numerical information storage and retrieval software developed by UNESCO
Image and Scanner Interface Specification
Infinitely Scalable Information Storage, a video storage system from Avid Technology
Integrated Software for Imagers and Spectrometers, software to process data collected by NASA planetary missions
IS-IS or ISIS, a network routing protocol
ISIS/Draw, a chemistry modelling program
Softcard or Isis Mobile Wallet, a mobile payment system
Unity ISIS, a storage device
Integrated Scientific Information System, software programs including the MDL Chime plug-in
ISIS, a variant of the JOSS programming language

Independent Schools Information Service, part of the Independent Schools Council
Isis Innovation or Oxford University Innovation, a British technology transfer company
ISIS Equity Partners or Livingbridge, a private equity firm headquartered in London
HM Prison Isis, a young offenders institution in London
Institute for Science and International Security, an American non-governmental institution
Institute for the Scientific Investigation of Sexuality or the Family Research Institute, an American anti-gay organization
Institute for the Secularisation of Islamic Society, an American organization
International Society for Iranian Studies or the Association for Iranian Studies, a U.S.-based academic organization
International Society for the Interdisciplinary Study of Symmetry
International Species Information System or Species360, a zoo and aquarium software development and data-sharing organization
ISIS Group or the Adara Group, an international development organisation dealing with issues of human trafficking
Isis-Urania Temple, a religious group
Innovative Solutions In Space, a Dutch aerospace company

Isis (lunar crater)
42 Isis, an asteroid
Electoral district of Isis, a former state electoral district in Queensland, Australia
Shire of Isis, a former local government area in Queensland, Australia
Port of Isis, Bulhar
Isis Highway, a highway in Queensland, Australia
The Isis, the upper part of the River Thames in Oxford, UK
- Isis Bridge, across the River Thames near Oxford, UK
Isis River, Queensland, a locality in Queensland, Australia
Isis River (Queensland), a river in Queensland, Australia
Isis, Ohio, an unincorporated community
Isis Temple, a prominence in the Grand Canyon in the United States

42 Isis, an asteroid
Isis (genus), a soft coral genus
ISIS (satellite), a series of Canadian satellites
Hippotion isis, a species of moth
International Studies of Infarct Survival, a set of clinical trials
ISIS neutron source, a pulsed neutron and muon source
Isis, a former research reactor at CEA Saclay
ISIS, alternate abbreviation for IS☉IS, an instrument aboard the Parker Solar Probe spacecraft to Earth's Sun

Integrated Sensor is Structure, a project to develop an airship for intelligence use
Integrated standby instrument system, a backup instrument display for aircraft
ISIS Drive or International Splined Interface Standard, a bicycle bottom bracket interface specification
Morris Isis, a car by Morris Motors from 1929 to 1931 and a car from the British Motor Corporation in the 1950s
Toyota Isis, a seven-seat large MPV