The Revenue Management Software market report provides a detailed analysis of global market size, regional and country-level market size, segmentation market growth, market share, competitive Landscape, sales analysis, impact of domestic and global market players, value chain optimization, trade regulations, recent developments, opportunities analysis, strategic market growth analysis, product launches, area marketplace expanding, and technological innovations. According to our latest research, the global Revenue Management Software size is estimated to be USD xx million in 2026 from USD xx million in 2020, with a change XX% between 2020 and 2021. The global Revenue Management Software market size is expected to grow at a CAGR of xx% for the next five years. Market segmentation Revenue Management Software market is split by Type and by Application. For the period 2016-2026, the growth among segments provide accurate calculations and forecasts for revenue by Type and by Application. This analysis can help you expand your business by targeting qualified niche markets. Market segment by Type, covers Cloud Based On-premises Market segment by Application, can be divided into Aviation Real Estate & Construction Media & Entertainment Telecommunication Transportation & Logistics Energy & Utilities Retail & Wholesale Manufacturing Tourism & Hospitality Others Market segment by players, this report covers Accenture Amdocs Ericsson Netcracker Oracle CSG Systems International Huawei Redknee SAP Suntec Market segment by regions, regional analysis covers North America (United States, Canada, and Mexico) Europe (Germany, France, UK, Russia, Italy, and Rest of Europe) Asia-Pacific (China, Japan, South Korea, India, Southeast Asia, Australia, and Rest of Asia-Pacific) South America (Brazil, Argentina, Rest of South America) Middle East & Africa (Turkey, Saudi Arabia, UAE, Rest of Middle East & Africa) The content of the study subjects, includes a total of 12 chapters: Chapter 1, to describe Revenue Management Software product scope, market overview, market opportunities, market driving force and market risks. Chapter 2, to profile the top players of Revenue Management Software, with revenue, gross margin and global market share of Revenue Management Software from 2019 to 2021. Chapter 3, the Revenue Management Software competitive situation, revenue and global market share of top players are analyzed emphatically by landscape contrast. Chapter 4 and 5, to segment the market size by type and application, with revenue and growth rate by type, application, from 2016 to 2026. Chapter 6, 7, 8, 9, and 10, to break the market size data at the country level, with revenue and market share for key countries in the world, from 2016 to 2021.and Revenue Management Software market forecast, by regions, type and application, with revenue, from 2021 to 2026. Chapter 11 and 12, to describe Revenue Management Software research findings and conclusion, appendix and data source.
1 Market Overview 1.1 Product Overview and Scope of Revenue Management Software 1.2 Classification of Revenue Management Software by Type 1.2.1 Overview: Global Revenue Management Software Market Size by Type: 2020 Versus 2021 Versus 2026 1.2.2 Global Revenue Management Software Revenue Market Share by Type in 2020 1.2.3 Cloud Based 1.2.4 On-premises 1.3 Global Revenue Management Software Market by Application 1.3.1 Overview: Global Revenue Management Software Market Size by Application: 2020 Versus 2021 Versus 2026 1.3.2 Aviation 1.3.3 Real Estate & Construction 1.3.4 Media & Entertainment 1.3.5 Telecommunication 1.3.6 Transportation & Logistics 1.3.7 Energy & Utilities 1.3.8 Retail & Wholesale 1.3.9 Manufacturing 1.3.10 Tourism & Hospitality 1.3.11 Others 1.4 Global Revenue Management Software Market Size & Forecast 1.5 Global Revenue Management Software Market Size and Forecast by Region 1.5.1 Global Revenue Management Software Market Size by Region: 2016 VS 2021 VS 2026 1.5.2 Global Revenue Management Software Market Size by Region, (2016-2021) 1.5.3 North America Revenue Management Software Market Size and Prospect (2016-2026) 1.5.4 Europe Revenue Management Software Market Size and Prospect (2016-2026) 1.5.5 Asia-Pacific Revenue Management Software Market Size and Prospect (2016-2026) 1.5.6 South America Revenue Management Software Market Size and Prospect (2016-2026) 1.5.7 Middle East and Africa Revenue Management Software Market Size and Prospect (2016-2026) 1.6 Market Drivers, Restraints and Trends 1.6.1 Revenue Management Software Market Drivers 1.6.2 Revenue Management Software Market Restraints 1.6.3 Revenue Management Software Trends Analysis 2 Company Profiles 2.1 Accenture 2.1.1 Accenture Details 2.1.2 Accenture Major Business 2.1.3 Accenture Revenue Management Software Product and Solutions 2.1.4 Accenture Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.1.5 Accenture Recent Developments and Future Plans 2.2 Amdocs 2.2.1 Amdocs Details 2.2.2 Amdocs Major Business 2.2.3 Amdocs Revenue Management Software Product and Solutions 2.2.4 Amdocs Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.2.5 Amdocs Recent Developments and Future Plans 2.3 Ericsson 2.3.1 Ericsson Details 2.3.2 Ericsson Major Business 2.3.3 Ericsson Revenue Management Software Product and Solutions 2.3.4 Ericsson Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.3.5 Ericsson Recent Developments and Future Plans 2.4 Netcracker 2.4.1 Netcracker Details 2.4.2 Netcracker Major Business 2.4.3 Netcracker Revenue Management Software Product and Solutions 2.4.4 Netcracker Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.4.5 Netcracker Recent Developments and Future Plans 2.5 Oracle 2.5.1 Oracle Details 2.5.2 Oracle Major Business 2.5.3 Oracle Revenue Management Software Product and Solutions 2.5.4 Oracle Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.5.5 Oracle Recent Developments and Future Plans 2.6 CSG Systems International 2.6.1 CSG Systems International Details 2.6.2 CSG Systems International Major Business 2.6.3 CSG Systems International Revenue Management Software Product and Solutions 2.6.4 CSG Systems International Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.6.5 CSG Systems International Recent Developments and Future Plans 2.7 Huawei 2.7.1 Huawei Details 2.7.2 Huawei Major Business 2.7.3 Huawei Revenue Management Software Product and Solutions 2.7.4 Huawei Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.7.5 Huawei Recent Developments and Future Plans 2.8 Redknee 2.8.1 Redknee Details 2.8.2 Redknee Major Business 2.8.3 Redknee Revenue Management Software Product and Solutions 2.8.4 Redknee Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.8.5 Redknee Recent Developments and Future Plans 2.9 SAP 2.9.1 SAP Details 2.9.2 SAP Major Business 2.9.3 SAP Revenue Management Software Product and Solutions 2.9.4 SAP Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.9.5 SAP Recent Developments and Future Plans 2.10 Suntec 2.10.1 Suntec Details 2.10.2 Suntec Major Business 2.10.3 Suntec Revenue Management Software Product and Solutions 2.10.4 Suntec Revenue Management Software Revenue, Gross Margin and Market Share (2019-2021) 2.10.5 Suntec Recent Developments and Future Plans 3 Market Competition, by Players 3.1 Global Revenue Management Software Revenue and Share by Players (2019-2021) 3.2 Market Concentration Rate 3.2.1 Top 3 Revenue Management Software Players Market Share 3.2.2 Top 10 Revenue Management Software Players Market Share 3.2.3 Market Competition Trend 3.3 Revenue Management Software Players Head Office, Products and Services Provided 3.4 Mergers & Acquisitions 3.5 New Entrants and Expansion Plans 4 Market Size Segment by Type 4.1 Global Revenue Management Software Revenue and Market Share by Type (2016-2021) 4.2 Global Revenue Management Software Market Forecast by Type (2021-2026) 5 Market Size Segment by Application 5.1 Global Revenue Management Software Revenue Market Share by Application (2016-2021) 5.2 Revenue Management Software Market Forecast by Application (2021-2026) 6 North America by Country, by Type, and by Application 6.1 North America Revenue Management Software Revenue by Type (2016-2026) 6.2 North America Revenue Management Software Revenue by Application (2016-2026) 6.3 North America Revenue Management Software Market Size by Country 6.3.1 North America Revenue Management Software Revenue by Country (2016-2026) 6.3.2 United States Revenue Management Software Market Size and Forecast (2016-2026) 6.3.3 Canada Revenue Management Software Market Size and Forecast (2016-2026) 6.3.4 Mexico Revenue Management Software Market Size and Forecast (2016-2026) 7 Europe by Country, by Type, and by Application 7.1 Europe Revenue Management Software Revenue by Type (2016-2026) 7.2 Europe Revenue Management Software Revenue by Application (2016-2026) 7.3 Europe Revenue Management Software Market Size by Country 7.3.1 Europe Revenue Management Software Revenue by Country (2016-2026) 7.3.2 Germany Revenue Management Software Market Size and Forecast (2016-2026) 7.3.3 France Revenue Management Software Market Size and Forecast (2016-2026) 7.3.4 United Kingdom Revenue Management Software Market Size and Forecast (2016-2026) 7.3.5 Russia Revenue Management Software Market Size and Forecast (2016-2026) 7.3.6 Italy Revenue Management Software Market Size and Forecast (2016-2026) 8 Asia-Pacific by Region, by Type, and by Application 8.1 Asia-Pacific Revenue Management Software Revenue by Type (2016-2026) 8.2 Asia-Pacific Revenue Management Software Revenue by Application (2016-2026) 8.3 Asia-Pacific Revenue Management Software Market Size by Region 8.3.1 Asia-Pacific Revenue Management Software Revenue by Region (2016-2026) 8.3.2 China Revenue Management Software Market Size and Forecast (2016-2026) 8.3.3 Japan Revenue Management Software Market Size and Forecast (2016-2026) 8.3.4 South Korea Revenue Management Software Market Size and Forecast (2016-2026) 8.3.5 India Revenue Management Software Market Size and Forecast (2016-2026) 8.3.6 Southeast Asia Revenue Management Software Market Size and Forecast (2016-2026) 8.3.7 Australia Revenue Management Software Market Size and Forecast (2016-2026) 9 South America by Country, by Type, and by Application 9.1 South America Revenue Management Software Revenue by Type (2016-2026) 9.2 South America Revenue Management Software Revenue by Application (2016-2026) 9.3 South America Revenue Management Software Market Size by Country 9.3.1 South America Revenue Management Software Revenue by Country (2016-2026) 9.3.2 Brazil Revenue Management Software Market Size and Forecast (2016-2026) 9.3.3 Argentina Revenue Management Software Market Size and Forecast (2016-2026) 10 Middle East & Africa by Country, by Type, and by Application 10.1 Middle East & Africa Revenue Management Software Revenue by Type (2016-2026) 10.2 Middle East & Africa Revenue Management Software Revenue by Application (2016-2026) 10.3 Middle East & Africa Revenue Management Software Market Size by Country 10.3.1 Middle East & Africa Revenue Management Software Revenue by Country (2016-2026) 10.3.2 Turkey Revenue Management Software Market Size and Forecast (2016-2026) 10.3.3 Saudi Arabia Revenue Management Software Market Size and Forecast (2016-2026) 10.3.4 UAE Revenue Management Software Market Size and Forecast (2016-2026) 11 Research Findings and Conclusion 12 Appendix 12.1 Methodology 12.2 Research Process and Data Source 12.3 Disclaimer
List of Tables Table 1. Global Revenue Management Software Revenue by Type, (USD Million), 2020 VS 2021 VS 2026 Table 2. Global Revenue Management Software Revenue by Application, (USD Million), 2020 VS 2021 VS 2026 Table 3. Global Market Revenue Management Software Revenue (Million USD) Comparison by Region (2016 VS 2021 VS 2026) Table 4. Global Revenue Management Software Revenue (USD Million) by Region (2016-2021) Table 5. Global Revenue Management Software Revenue Market Share by Region (2021-2026) Table 6. Accenture Corporate Information, Head Office, and Major Competitors Table 7. Accenture Major Business Table 8. Accenture Revenue Management Software Product and Solutions Table 9. Accenture Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 10. Amdocs Corporate Information, Head Office, and Major Competitors Table 11. Amdocs Major Business Table 12. Amdocs Revenue Management Software Product and Solutions Table 13. Amdocs Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 14. Ericsson Corporate Information, Head Office, and Major Competitors Table 15. Ericsson Major Business Table 16. Ericsson Revenue Management Software Product and Solutions Table 17. Ericsson Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 18. Netcracker Corporate Information, Head Office, and Major Competitors Table 19. Netcracker Major Business Table 20. Netcracker Revenue Management Software Product and Solutions Table 21. Netcracker Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 22. Oracle Corporate Information, Head Office, and Major Competitors Table 23. Oracle Major Business Table 24. Oracle Revenue Management Software Product and Solutions Table 25. Oracle Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 26. CSG Systems International Corporate Information, Head Office, and Major Competitors Table 27. CSG Systems International Major Business Table 28. CSG Systems International Revenue Management Software Product and Solutions Table 29. CSG Systems International Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 30. Huawei Corporate Information, Head Office, and Major Competitors Table 31. Huawei Major Business Table 32. Huawei Revenue Management Software Product and Solutions Table 33. Huawei Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 34. Redknee Corporate Information, Head Office, and Major Competitors Table 35. Redknee Major Business Table 36. Redknee Revenue Management Software Product and Solutions Table 37. Redknee Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 38. SAP Corporate Information, Head Office, and Major Competitors Table 39. SAP Major Business Table 40. SAP Revenue Management Software Product and Solutions Table 41. SAP Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 42. Suntec Corporate Information, Head Office, and Major Competitors Table 43. Suntec Major Business Table 44. Suntec Revenue Management Software Product and Solutions Table 45. Suntec Revenue Management Software Revenue (USD Million), Gross Margin and Market Share (2019-2021) Table 46. Global Revenue Management Software Revenue (USD Million) by Players (2019-2021) Table 47. Global Revenue Management Software Revenue Share by Players (2019-2021) Table 48. Breakdown of Revenue Management Software by Company Type (Tier 1, Tier 2 and Tier 3) Table 49. Revenue Management Software Players Head Office, Products and Services Provided Table 50. Revenue Management Software Mergers & Acquisitions in the Past Five Years Table 51. Revenue Management Software New Entrants and Expansion Plans Table 52. Global Revenue Management Software Revenue (USD Million) by Type (2016-2021) Table 53. Global Revenue Management Software Revenue Share by Type (2016-2021) Table 54. Global Revenue Management Software Revenue Forecast by Type (2021-2026) Table 55. Global Revenue Management Software Revenue by Application (2016-2021) Table 56. Global Revenue Management Software Revenue Forecast by Application (2021-2026) Table 57. North America Revenue Management Software Revenue by Type (2016-2021) & (USD Million) Table 58. North America Revenue Management Software Revenue by Type (2021-2026) & (USD Million) Table 59. North America Revenue Management Software Revenue by Application (2016-2021) & (USD Million) Table 60. North America Revenue Management Software Revenue by Application (2021-2026) & (USD Million) Table 61. North America Revenue Management Software Revenue by Country (2016-2021) & (USD Million) Table 62. North America Revenue Management Software Revenue by Country (2021-2026) & (USD Million) Table 63. Europe Revenue Management Software Revenue by Type (2016-2021) & (USD Million) Table 64. Europe Revenue Management Software Revenue by Type (2021-2026) & (USD Million) Table 65. Europe Revenue Management Software Revenue by Application (2016-2021) & (USD Million) Table 66. Europe Revenue Management Software Revenue by Application (2021-2026) & (USD Million) Table 67. Europe Revenue Management Software Revenue by Country (2016-2021) & (USD Million) Table 68. Europe Revenue Management Software Revenue by Country (2021-2026) & (USD Million) Table 69. Asia-Pacific Revenue Management Software Revenue by Type (2016-2021) & (USD Million) Table 70. Asia-Pacific Revenue Management Software Revenue by Type (2021-2026) & (USD Million) Table 71. Asia-Pacific Revenue Management Software Revenue by Application (2016-2021) & (USD Million) Table 72. Asia-Pacific Revenue Management Software Revenue by Application (2021-2026) & (USD Million) Table 73. Asia-Pacific Revenue Management Software Revenue by Region (2016-2021) & (USD Million) Table 74. Asia-Pacific Revenue Management Software Revenue by Region (2021-2026) & (USD Million) Table 75. South America Revenue Management Software Revenue by Type (2016-2021) & (USD Million) Table 76. South America Revenue Management Software Revenue by Type (2021-2026) & (USD Million) Table 77. South America Revenue Management Software Revenue by Application (2016-2021) & (USD Million) Table 78. South America Revenue Management Software Revenue by Application (2021-2026) & (USD Million) Table 79. South America Revenue Management Software Revenue by Country (2016-2021) & (USD Million) Table 80. South America Revenue Management Software Revenue by Country (2021-2026) & (USD Million) Table 81. Middle East & Africa Revenue Management Software Revenue by Type (2016-2021) & (USD Million) Table 82. Middle East & Africa Revenue Management Software Revenue by Type (2021-2026) & (USD Million) Table 83. Middle East & Africa Revenue Management Software Revenue by Application (2016-2021) & (USD Million) Table 84. Middle East & Africa Revenue Management Software Revenue by Application (2021-2026) & (USD Million) Table 85. Middle East & Africa Revenue Management Software Revenue by Country (2016-2021) & (USD Million) Table 86. Middle East & Africa Revenue Management Software Revenue by Country (2021-2026) & (USD Million) List of Figures Figure 1. Revenue Management Software Picture Figure 2. Global Revenue Management Software Revenue Market Share by Type in 2020 Figure 3. Cloud Based Figure 4. On-premises Figure 5. Revenue Management Software Revenue Market Share by Application in 2020 Figure 6. Aviation Picture Figure 7. Real Estate & Construction Picture Figure 8. Media & Entertainment Picture Figure 9. Telecommunication Picture Figure 10. Transportation & Logistics Picture Figure 11. Energy & Utilities Picture Figure 12. Retail & Wholesale Picture Figure 13. Manufacturing Picture Figure 14. Tourism & Hospitality Picture Figure 15. Global Revenue Management Software Revenue, (USD Million): 2020 VS 2021 VS 2026 Figure 16. Global Revenue Management Software Revenue and Forecast (2016-2026) & (USD Million) Figure 17. Global Revenue Management Software Revenue Market Share by Region (2016-2026) Figure 18. Global Revenue Management Software Revenue Market Share by Region in 2020 Figure 19. North America Revenue Management Software Revenue (USD Million) and Growth Rate (2016-2026) Figure 20. Europe Revenue Management Software Revenue (USD Million) and Growth Rate (2016-2026) Figure 21. Asia-Pacific Revenue Management Software Revenue (USD Million) and Growth Rate (2016-2026) Figure 22. South America Revenue Management Software Revenue (USD Million) and Growth Rate (2016-2026) Figure 23. Middle East and Africa Revenue Management Software Revenue (USD Million) and Growth Rate (2016-2026) Figure 24. Revenue Management Software Market Drivers Figure 25. Revenue Management Software Market Restraints Figure 26. Revenue Management Software Market Trends Figure 27. Accenture Recent Developments and Future Plans Figure 28. Amdocs Recent Developments and Future Plans Figure 29. Ericsson Recent Developments and Future Plans Figure 30. Netcracker Recent Developments and Future Plans Figure 31. Oracle Recent Developments and Future Plans Figure 32. CSG Systems International Recent Developments and Future Plans Figure 33. Huawei Recent Developments and Future Plans Figure 34. Redknee Recent Developments and Future Plans Figure 35. SAP Recent Developments and Future Plans Figure 36. Suntec Recent Developments and Future Plans Figure 37. Global Revenue Management Software Revenue Share by Players in 2020 Figure 38. Revenue Management Software Market Share by Company Type (Tier 1, Tier 2 and Tier 3) Figure 39. Global Top 3 Players Revenue Management Software Revenue Market Share in 2020 Figure 40. Global Top 10 Players Revenue Management Software Revenue Market Share in 2020 Figure 41. Key Players Market Share Trend (Top 3 Market Share: 2019 VS 2020 VS 2021) Figure 42. Global Revenue Management Software Revenue Share by Type in 2020 Figure 43. Global Revenue Management Software Market Share Forecast by Type (2021-2026) Figure 44. Global Revenue Management Software Revenue Share by Application in 2020 Figure 45. Global Revenue Management Software Market Share Forecast by Application (2021-2026) Figure 46. North America Revenue Management Software Sales Market Share by Type (2016-2026) Figure 47. North America Revenue Management Software Sales Market Share by Application (2016-2026) Figure 48. North America Revenue Management Software Revenue Market Share by Country (2016-2026) Figure 49. United States Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 50. Canada Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 51. Mexico Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 52. Europe Revenue Management Software Sales Market Share by Type (2016-2026) Figure 53. Europe Revenue Management Software Sales Market Share by Application (2016-2026) Figure 54. Europe Revenue Management Software Revenue Market Share by Country (2016-2026) Figure 55. Germany Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 56. France Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 57. United Kingdom Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 58. Russia Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 59. Italy Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 60. Asia-Pacific Revenue Management Software Sales Market Share by Type (2016-2026) Figure 61. Asia-Pacific Revenue Management Software Sales Market Share by Application (2016-2026) Figure 62. Asia-Pacific Revenue Management Software Revenue Market Share by Region (2016-2026) Figure 63. China Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 64. Japan Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 65. South Korea Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 66. India Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 67. Southeast Asia Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 68. Australia Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 69. South America Revenue Management Software Sales Market Share by Type (2016-2026) Figure 70. South America Revenue Management Software Sales Market Share by Application (2016-2026) Figure 71. South America Revenue Management Software Revenue Market Share by Country (2016-2026) Figure 72. Brazil Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 73. Argentina Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 74. Middle East and Africa Revenue Management Software Sales Market Share by Type (2016-2026) Figure 75. Middle East and Africa Revenue Management Software Sales Market Share by Application (2016-2026) Figure 76. Middle East and Africa Revenue Management Software Revenue Market Share by Country (2016-2026) Figure 77. Turkey Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 78. Saudi Arabia Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 79. UAE Revenue Management Software Revenue and Growth Rate (2016-2026) & (USD Million) Figure 80. Methodology Figure 81. Research Process and Data Source