Global Semiconductor type Gas Sensor Market Research Report 2012-2024
SUMMARY
The global Semiconductor type Gas Sensor market will reach xxx Million USD in 2019 with CAGR xx% 2019-2024. The objective of report is to define, segment, and project the market on the basis of product type, application, and region, and to describe the content about the factors influencing market dynamics, policy, economic, technology and market entry etc.
Based on products type, the report describes major products type share of regional market. Products mentioned as follows:
The global Semiconductor type Gas Sensor market will reach xxx Million USD in 2019 with CAGR xx% 2019-2024. The objective of report is to define, segment, and project the market on the basis of product type, application, and region, and to describe the content about the factors influencing market dynamics, policy, economic, technology and market entry etc.
Based on products type, the report describes major products type share of regional market. Products mentioned as follows:
- General Air Quality
- Harmful Substances
- Others
- Figaro
- SGX Sensortech
- FIS
- Honeywell
- Siemens
- Ogam Technology
- GE Measurement & Control
- Aeroqual
- BAPI
- Sharp
- Dovelet Sensors
- Winsen Electronic
- Wuhan Cubic
- SHANXI TENGXING
- Home
- Public Places
- Automobile
- Others
- Asia-Pacific
- North America
- Europe
- South America
- Middle East & Africa
1 MARKET OVERVIEW
1.1 Objectives of Research
1.1.1 Definition
1.1.2 Specifications
1.2 Market Segment
1.2.1 by Type
1.2.1.1 General Air Quality
1.2.1.2 Harmful Substances
1.2.1.3 Others
1.2.2 by Application
1.2.2.1 Home
1.2.2.2 Public Places
1.2.2.3 Automobile
1.2.2.4 Others
1.2.3 by Regions
2 INDUSTRY CHAIN
2.1 Industry Chain Structure
2.2 Upstream
2.3 Market
2.3.1 SWOT
2.3.2 Dynamics
3 ENVIRONMENTAL ANALYSIS
3.1 Policy
3.2 Economic
3.3 Technology
3.4 Market Entry
4 MARKET SEGMENTATION BY TYPE
4.1 Market Size
4.1.1 General Air Quality Market, 2013-2018
4.1.2 Harmful Substances Market, 2013-2018
4.1.3 Others Market, 2013-2018
4.2 Market Forecast
4.2.1 General Air Quality Market Forecast, 2019-2024
4.2.2 Harmful Substances Market Forecast, 2019-2024
4.2.3 Others Market Forecast, 2019-2024
5 MARKET SEGMENTATION BY APPLICATION
5.1 Market Size
5.1.1 Home Market, 2013-2018
5.1.2 Public Places Market, 2013-2018
5.1.3 Automobile Market, 2013-2018
5.1.4 Others Market, 2013-2018
5.2 Market Forecast
5.2.1 Home Market Forecast, 2019-2024
5.2.2 Public Places Market Forecast, 2019-2024
5.2.3 Automobile Market Forecast, 2019-2024
5.2.4 Others Market Forecast, 2019-2024
6 MARKET SEGMENTATION BY REGION
6.1 Market Size
6.1.1 Asia-Pacific
6.1.1.1 Asia-Pacific Market, 2012-2018
6.1.1.2 Asia-Pacific Market by Type
6.1.1.3 Asia-Pacific Market by Application
6.1.2 North America
6.1.2.1 North America Market, 2012-2018
6.1.2.2 North America Market by Type
6.1.2.3 North America Market by Application
6.1.3 Europe
6.1.3.1 Europe Market, 2012-2018
6.1.3.2 Europe Market by Type
6.1.3.3 Europe Market by Application
6.1.4 South America
6.1.4.1 South America Market, 2012-2018
6.1.4.2 South America Market by Type
6.1.4.3 South America Market by Application
6.1.5 Middle East & Africa
6.1.5.1 Middle East & Africa Market, 2012-2018
6.1.5.2 Middle East & Africa Market by Type
6.1.5.3 Middle East & Africa Market by Application
6.2 Market Forecast
6.2.1 Asia-Pacific Market Forecast, 2019-2024
6.2.2 North America Market Forecast, 2019-2024
6.2.3 Europe Market Forecast, 2019-2024
6.2.4 South America Market Forecast, 2019-2024
6.2.5 Middle East & Africa Market Forecast, 2019-2024
7 MARKET COMPETITIVE
7.1 Global Market by Vendors
7.2 Market Concentration
7.3 Price & Factors
7.4 Marketing Channel
8 MAJOR VENDORS
8.1 Figaro
8.2 SGX Sensortech
8.3 FIS
8.4 Honeywell
8.5 Siemens
8.6 Ogam Technology
8.7 GE Measurement & Control
8.8 Aeroqual
8.9 BAPI
8.10 Sharp
8.11 Dovelet Sensors
8.12 Winsen Electronic
8.13 Wuhan Cubic
8.14 SHANXI TENGXING
9 CONCLUSION
1.1 Objectives of Research
1.1.1 Definition
1.1.2 Specifications
1.2 Market Segment
1.2.1 by Type
1.2.1.1 General Air Quality
1.2.1.2 Harmful Substances
1.2.1.3 Others
1.2.2 by Application
1.2.2.1 Home
1.2.2.2 Public Places
1.2.2.3 Automobile
1.2.2.4 Others
1.2.3 by Regions
2 INDUSTRY CHAIN
2.1 Industry Chain Structure
2.2 Upstream
2.3 Market
2.3.1 SWOT
2.3.2 Dynamics
3 ENVIRONMENTAL ANALYSIS
3.1 Policy
3.2 Economic
3.3 Technology
3.4 Market Entry
4 MARKET SEGMENTATION BY TYPE
4.1 Market Size
4.1.1 General Air Quality Market, 2013-2018
4.1.2 Harmful Substances Market, 2013-2018
4.1.3 Others Market, 2013-2018
4.2 Market Forecast
4.2.1 General Air Quality Market Forecast, 2019-2024
4.2.2 Harmful Substances Market Forecast, 2019-2024
4.2.3 Others Market Forecast, 2019-2024
5 MARKET SEGMENTATION BY APPLICATION
5.1 Market Size
5.1.1 Home Market, 2013-2018
5.1.2 Public Places Market, 2013-2018
5.1.3 Automobile Market, 2013-2018
5.1.4 Others Market, 2013-2018
5.2 Market Forecast
5.2.1 Home Market Forecast, 2019-2024
5.2.2 Public Places Market Forecast, 2019-2024
5.2.3 Automobile Market Forecast, 2019-2024
5.2.4 Others Market Forecast, 2019-2024
6 MARKET SEGMENTATION BY REGION
6.1 Market Size
6.1.1 Asia-Pacific
6.1.1.1 Asia-Pacific Market, 2012-2018
6.1.1.2 Asia-Pacific Market by Type
6.1.1.3 Asia-Pacific Market by Application
6.1.2 North America
6.1.2.1 North America Market, 2012-2018
6.1.2.2 North America Market by Type
6.1.2.3 North America Market by Application
6.1.3 Europe
6.1.3.1 Europe Market, 2012-2018
6.1.3.2 Europe Market by Type
6.1.3.3 Europe Market by Application
6.1.4 South America
6.1.4.1 South America Market, 2012-2018
6.1.4.2 South America Market by Type
6.1.4.3 South America Market by Application
6.1.5 Middle East & Africa
6.1.5.1 Middle East & Africa Market, 2012-2018
6.1.5.2 Middle East & Africa Market by Type
6.1.5.3 Middle East & Africa Market by Application
6.2 Market Forecast
6.2.1 Asia-Pacific Market Forecast, 2019-2024
6.2.2 North America Market Forecast, 2019-2024
6.2.3 Europe Market Forecast, 2019-2024
6.2.4 South America Market Forecast, 2019-2024
6.2.5 Middle East & Africa Market Forecast, 2019-2024
7 MARKET COMPETITIVE
7.1 Global Market by Vendors
7.2 Market Concentration
7.3 Price & Factors
7.4 Marketing Channel
8 MAJOR VENDORS
8.1 Figaro
8.2 SGX Sensortech
8.3 FIS
8.4 Honeywell
8.5 Siemens
8.6 Ogam Technology
8.7 GE Measurement & Control
8.8 Aeroqual
8.9 BAPI
8.10 Sharp
8.11 Dovelet Sensors
8.12 Winsen Electronic
8.13 Wuhan Cubic
8.14 SHANXI TENGXING
9 CONCLUSION
LIST OF TABLES
Table Product Specifications of Semiconductor type Gas Sensor
Table Products Segment of Semiconductor type Gas Sensor
Table General Air Quality Overview
Table Harmful Substances Overview
Table Others Overview
Table Global Semiconductor type Gas Sensor Market by Type, 2011-2022 (USD Million)
Table Application Segment of Semiconductor type Gas Sensor
Table Home Overview
Table Public Places Overview
Table Automobile Overview
Table Others Overview
Table Global Semiconductor type Gas Sensor Market by Application, 2011-2022 (USD Million)
Table Global Semiconductor type Gas Sensor Market by Region, 2011-2022 (USD Million)
Table Cost of Semiconductor type Gas Sensor
Table Market Dynamics
Table Policy of Semiconductor type Gas Sensor
Table GDP of Major Countries
Table General Air Quality CAGR by Revenue and Volume, 2012-2018
Table Harmful Substances CAGR by Revenue and Volume, 2012-2018
Table Others CAGR by Revenue and Volume, 2012-2018
Table General Air Quality CAGR by Revenue and Volume, 2012-2024
Table Harmful Substances CAGR by Revenue and Volume, 2012-2024
Table Others CAGR by Revenue and Volume, 2012-2024
Table Home CAGR by Revenue and Volume, 2012-2018
Table Public Places CAGR by Revenue and Volume, 2012-2018
Table Automobile CAGR by Revenue and Volume, 2012-2018
Table Others CAGR by Revenue and Volume, 2012-2018
Table Global Semiconductor type Gas Sensor Market by Vendors, 2012-2018 (USD Million)
Table Global Semiconductor type Gas Sensor Market by Vendors, 2012-2018 (in Volume)
Table Global Semiconductor type Gas Sensor Market Share by Vendors, 2012-2018 (USD Million)
Table Global Semiconductor type Gas Sensor Market Share by Vendors, 2012-2018 (in Volume)
Table Price Factors List
Table Figaro Profile List
Table Microecological Modulator Operating Data of Figaro (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table SGX Sensortech Profile List
Table Microecological Modulator Operating Data of SGX Sensortech (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table FIS Profile List
Table Microecological Modulator Operating Data of FIS (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Honeywell Profile List
Table Microecological Modulator Operating Data of Honeywell (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Siemens Profile List
Table Microecological Modulator Operating Data of Siemens (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Ogam Technology Profile List
Table Microecological Modulator Operating Data of Ogam Technology (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table GE Measurement & Control Profile List
Table Microecological Modulator Operating Data of GE Measurement & Control (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Aeroqual Profile List
Table Microecological Modulator Operating Data of Aeroqual (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table BAPI Profile List
Table Microecological Modulator Operating Data of BAPI (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Sharp Profile List
Table Microecological Modulator Operating Data of Sharp (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Dovelet Sensors Profile List
Table Microecological Modulator Operating Data of Dovelet Sensors (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Winsen Electronic Profile List
Table Microecological Modulator Operating Data of Winsen Electronic (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Wuhan Cubic Profile List
Table Microecological Modulator Operating Data of Wuhan Cubic (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table SHANXI TENGXING Profile List
Table Microecological Modulator Operating Data of SHANXI TENGXING (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Product Specifications of Semiconductor type Gas Sensor
Table Products Segment of Semiconductor type Gas Sensor
Table General Air Quality Overview
Table Harmful Substances Overview
Table Others Overview
Table Global Semiconductor type Gas Sensor Market by Type, 2011-2022 (USD Million)
Table Application Segment of Semiconductor type Gas Sensor
Table Home Overview
Table Public Places Overview
Table Automobile Overview
Table Others Overview
Table Global Semiconductor type Gas Sensor Market by Application, 2011-2022 (USD Million)
Table Global Semiconductor type Gas Sensor Market by Region, 2011-2022 (USD Million)
Table Cost of Semiconductor type Gas Sensor
Table Market Dynamics
Table Policy of Semiconductor type Gas Sensor
Table GDP of Major Countries
Table General Air Quality CAGR by Revenue and Volume, 2012-2018
Table Harmful Substances CAGR by Revenue and Volume, 2012-2018
Table Others CAGR by Revenue and Volume, 2012-2018
Table General Air Quality CAGR by Revenue and Volume, 2012-2024
Table Harmful Substances CAGR by Revenue and Volume, 2012-2024
Table Others CAGR by Revenue and Volume, 2012-2024
Table Home CAGR by Revenue and Volume, 2012-2018
Table Public Places CAGR by Revenue and Volume, 2012-2018
Table Automobile CAGR by Revenue and Volume, 2012-2018
Table Others CAGR by Revenue and Volume, 2012-2018
Table Global Semiconductor type Gas Sensor Market by Vendors, 2012-2018 (USD Million)
Table Global Semiconductor type Gas Sensor Market by Vendors, 2012-2018 (in Volume)
Table Global Semiconductor type Gas Sensor Market Share by Vendors, 2012-2018 (USD Million)
Table Global Semiconductor type Gas Sensor Market Share by Vendors, 2012-2018 (in Volume)
Table Price Factors List
Table Figaro Profile List
Table Microecological Modulator Operating Data of Figaro (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table SGX Sensortech Profile List
Table Microecological Modulator Operating Data of SGX Sensortech (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table FIS Profile List
Table Microecological Modulator Operating Data of FIS (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Honeywell Profile List
Table Microecological Modulator Operating Data of Honeywell (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Siemens Profile List
Table Microecological Modulator Operating Data of Siemens (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Ogam Technology Profile List
Table Microecological Modulator Operating Data of Ogam Technology (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table GE Measurement & Control Profile List
Table Microecological Modulator Operating Data of GE Measurement & Control (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Aeroqual Profile List
Table Microecological Modulator Operating Data of Aeroqual (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table BAPI Profile List
Table Microecological Modulator Operating Data of BAPI (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Sharp Profile List
Table Microecological Modulator Operating Data of Sharp (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Dovelet Sensors Profile List
Table Microecological Modulator Operating Data of Dovelet Sensors (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Winsen Electronic Profile List
Table Microecological Modulator Operating Data of Winsen Electronic (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table Wuhan Cubic Profile List
Table Microecological Modulator Operating Data of Wuhan Cubic (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
Table SHANXI TENGXING Profile List
Table Microecological Modulator Operating Data of SHANXI TENGXING (Sales Revenue, Sales Volume, Price, Cost, Gross Margin)
LIST OF FIGURES
Figure Semiconductor type Gas Sensor Picture
Figure Industry Chain Structure of Semiconductor type Gas Sensor
Figure SWOT of Semiconductor type Gas Sensor
Figure General Air Quality Market Size and Growth, 2012-2018 (USD Million)
Figure General Air Quality Market Size and Growth, 2012-2018 (in Volume)
Figure Harmful Substances Market Size and Growth, 2012-2018 (USD Million)
Figure Harmful Substances Market Size and Growth, 2012-2018 (in Volume)
Figure Others Market Size and Growth, 2012-2018 (USD Million)
Figure Others Market Size and Growth, 2012-2018 (in Volume)
Figure General Air Quality Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure General Air Quality Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Harmful Substances Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Harmful Substances Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Others Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Others Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Home Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Public Places Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Automobile Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Others Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Asia-Pacific Market Size and Growth, 2012-2018 (USD Million)
Figure Asia-Pacific Market Size and Growth, 2012-2018 (in Volume)
Figure Asia-Pacific Market Size by Type
Figure Asia-Pacific Market Share by Type
Figure Asia-Pacific Market Size by Application
Figure Asia-Pacific Market Share by Application
Figure North America Market Size and Growth, 2012-2018 (USD Million)
Figure North America Market Size and Growth, 2012-2018 (in Volume)
Figure North America Market Size by Type
Figure North America Market Share by Type
Figure North America Market Size by Application
Figure North America Market Share by Application
Figure Europe Market Size and Growth, 2012-2018 (USD Million)
Figure Europe Market Size and Growth, 2012-2018 (in Volume)
Figure Europe Market Size by Type
Figure Europe Market Share by Type
Figure Europe Market Size by Application
Figure Europe Market Share by Application
Figure South America Market Size and Growth, 2012-2018 (USD Million)
Figure South America Market Size and Growth, 2012-2018 (in Volume)
Figure South America Market Size by Type
Figure South America Market Share by Type
Figure South America Market Size by Application
Figure South America Market Share by Application
Figure Middle East & Africa Market Size and Growth, 2012-2018 (USD Million)
Figure Middle East & Africa Market Size and Growth, 2012-2018 (in Volume)
Figure Middle East & Africa Market Size by Type
Figure Middle East & Africa Market Share by Type
Figure Middle East & Africa Market Size by Application
Figure Middle East & Africa Market Share by Application
Figure Asia-Pacific Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Asia-Pacific Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure North America Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure North America Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Europe Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Europe Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure South America Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure South America Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Middle East & Africa Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Middle East & Africa Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Semiconductor type Gas Sensor Market Concentration by Region
Figure Marketing Channels Overview
Figure Semiconductor type Gas Sensor Picture
Figure Industry Chain Structure of Semiconductor type Gas Sensor
Figure SWOT of Semiconductor type Gas Sensor
Figure General Air Quality Market Size and Growth, 2012-2018 (USD Million)
Figure General Air Quality Market Size and Growth, 2012-2018 (in Volume)
Figure Harmful Substances Market Size and Growth, 2012-2018 (USD Million)
Figure Harmful Substances Market Size and Growth, 2012-2018 (in Volume)
Figure Others Market Size and Growth, 2012-2018 (USD Million)
Figure Others Market Size and Growth, 2012-2018 (in Volume)
Figure General Air Quality Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure General Air Quality Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Harmful Substances Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Harmful Substances Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Others Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Others Market Estimates and Forecasts, 2019-2024 (in Volume)
Figure Home Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Public Places Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Automobile Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Others Market Size and Growth, 2012-2018 (USD Million)
Figure Market Size and Growth, 2012-2018 (in Volume)
Figure Asia-Pacific Market Size and Growth, 2012-2018 (USD Million)
Figure Asia-Pacific Market Size and Growth, 2012-2018 (in Volume)
Figure Asia-Pacific Market Size by Type
Figure Asia-Pacific Market Share by Type
Figure Asia-Pacific Market Size by Application
Figure Asia-Pacific Market Share by Application
Figure North America Market Size and Growth, 2012-2018 (USD Million)
Figure North America Market Size and Growth, 2012-2018 (in Volume)
Figure North America Market Size by Type
Figure North America Market Share by Type
Figure North America Market Size by Application
Figure North America Market Share by Application
Figure Europe Market Size and Growth, 2012-2018 (USD Million)
Figure Europe Market Size and Growth, 2012-2018 (in Volume)
Figure Europe Market Size by Type
Figure Europe Market Share by Type
Figure Europe Market Size by Application
Figure Europe Market Share by Application
Figure South America Market Size and Growth, 2012-2018 (USD Million)
Figure South America Market Size and Growth, 2012-2018 (in Volume)
Figure South America Market Size by Type
Figure South America Market Share by Type
Figure South America Market Size by Application
Figure South America Market Share by Application
Figure Middle East & Africa Market Size and Growth, 2012-2018 (USD Million)
Figure Middle East & Africa Market Size and Growth, 2012-2018 (in Volume)
Figure Middle East & Africa Market Size by Type
Figure Middle East & Africa Market Share by Type
Figure Middle East & Africa Market Size by Application
Figure Middle East & Africa Market Share by Application
Figure Asia-Pacific Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Asia-Pacific Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure North America Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure North America Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Europe Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Europe Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure South America Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure South America Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Middle East & Africa Market Estimates and Forecasts, 2019-2024 (USD Million)
Figure Middle East & Africa Market Estimates and Forecasts, 2019-2024 (in Kilo Units)
Figure Semiconductor type Gas Sensor Market Concentration by Region
Figure Marketing Channels Overview
