The fastest-growing skill in the third quarter on Upwork Inc. (NASDAQ: UPWK) was “.NET Core,” an open-source development platform maintained by Microsoft. That’s according to a report released by online staffing firm Upwork that lists the 100 skills with the fastest growth. The second fastest-growing skill was TypeScript, an open source programming language developed by Microsoft.

Many of the skills were related to technology, but not all; romance writing ranked No. 86.

Upwork’s report noted the average hourly rate for the top 100 skills in the third quarter was $43.72. That’s higher than the $28 median hourly rate overall for freelancers providing skilled services. And demand for the top 100 skills grew more than 45% year over year in the third quarter with the top 10 growing by more than 260%.

The Upwork 100 skills list is based on skills sought on the its online staffing platform. The analysis to find the 100 fastest-growing skills starts by including only skills that have been in the top 500 in terms of freelancer billings over the past four complete quarters. From that, the 100 fastest-growing skills are ranked based on year-over-year growth rates in freelancer billings for the third quarter of 2019.

Here’s the list of the top 100 skills:

1. .NET Core

2. TypeScript

3. Landing pages

4. eBooks

5. Android

6. Electronic design

7. Presentation

8. Sketch

9. Research

10. Technical recruiter

11. Bank reconciliation

12. Slack

13. Google Tag Manager

14. Sourcing

15. Amazon Web Services

16. Video post-editing

17. LinkedIn recruiting

18. Data visualization

19. Interviewing

20. Interior design

21. System administration

22. Kubernetes

23. Data scraping

24. Technical documentation

25. Project scheduling

26. Adobe Premiere Pro

27. 2D animation

28. Firebase

29. Customer retention marketing

30. Salesforce Lightning

31. DevOps

32. Selenium

33. Accounts receivable management

34. Microsoft Windows Azure

35. Database design

36. AutoCAD

37. Usability testing

38. C development

39. Accounts payable management

40. Lead generation

41. Product descriptions

42. Certified Public Accountant

43. Circuit design

44. eLearning

45. Google Docs

46. Docker

47. GitHub

48. Redux for JavaScript

49. Business planning

50. Data entry

51. Motion graphics

52. Infographics

53. Architecture

54. ASP.NET

55. Asana

56. Instagram marketing

57. Shopify development

58. Search engine optimization

59. Architectural rendering

60. PostgreSQL administration

61. Salesforce app development

62. Python

63. Magento 2

64. Link building

65. MongoDB

66. Bootstrap

67. SEO writing

68. Web scraping

69. Animation

70. Network security

71. 3D rendering

72. Agile project management

73. Administrative support

74. Data mining

75. Internet research

76. English grammar

77. Squarespace

78. Elasticsearch

79. Startup consulting

80. AWS Lambda

81. Branding

82. Media relations

83. Appointment setting

84. 3D design

85. Bookkeeping

86. Romance writing

87. Budgeting and forecasting

88. Product design

89. Financial accounting

90. Adobe After Effects

91. Zendesk

92. Accounting

93. Virtual assistant

94. Google Cloud Platform

95. Postgre SQL programming

96. Tax preparation

97. Embedded systems

98. Audio editing

99. Google Analytics

100. Amazon S3

The top 10 industries hiring the top 100 skills included:

1. Consulting

2. Internet software and services

3. Internet

4. Consumer discretionary

5. Healthcare

6. Consumer staples

7. Publishing

8. Education

9. Advertising

10. Specialized consumer services