The most popular keywords in modern research

top100.md

The most popular keywords in modern research

What you will see below, is an extract from Microsoft Academic Graph. I counted every keyword used in more than 80 million research papers.

Top 100 keywords along with number of their occurrences.

1. humanidades - 720,429
2. bioinformatics - 700,032
3. [biomedical research](https://academic.microsoft.com/#/search?q=biomedical research&iq=%2540biomedical research%2540&filters=&from=0&sort=0) - 624,874
4. kinetics - 449,695
5. genetics - 438,081
6. spectrum - 427,706
7. biology - 358,565
8. medicine - 356,349
9. [mathematical model](https://academic.microsoft.com/#/search?q=mathematical model&iq=%2540mathematical model%2540&filters=&from=0&sort=0) - 338,009
10. [magnetic field](https://academic.microsoft.com/#/search?q=magnetic field&iq=%2540magnetic field%2540&filters=&from=0&sort=0) - 335,559
11. enzyme - 309,175
12. nitrogen - 300,273
13. iron - 299,830
14. [cross section](https://academic.microsoft.com/#/search?q=cross section&iq=%2540cross section%2540&filters=&from=0&sort=0) - 295,181
15. oscillations - 288,823
16. [higher education](https://academic.microsoft.com/#/search?q=higher education&iq=%2540higher education%2540&filters=&from=0&sort=0) - 280,800
17. [human factors](https://academic.microsoft.com/#/search?q=human factors&iq=%2540human factors%2540&filters=&from=0&sort=0) - 269,558
18. copper - 261,244
19. indexation - 261,012
20. [three dimensional](https://academic.microsoft.com/#/search?q=three dimensional&iq=%2540three dimensional%2540&filters=&from=0&sort=0) - 251,813
21. ergonomics - 251,674
22. [occupational safety](https://academic.microsoft.com/#/search?q=occupational safety&iq=%2540occupational safety%2540&filters=&from=0&sort=0) - 247,894
23. [injury prevention](https://academic.microsoft.com/#/search?q=injury prevention&iq=%2540injury prevention%2540&filters=&from=0&sort=0) - 246,608
24. [suicide prevention](https://academic.microsoft.com/#/search?q=suicide prevention&iq=%2540suicide prevention%2540&filters=&from=0&sort=0) - 244,970
25. [thin film](https://academic.microsoft.com/#/search?q=thin film&iq=%2540thin film%2540&filters=&from=0&sort=0) - 235,267
26. physics - 233,603
27. history - 233,036
28. management - 229,268
29. health - 218,187
30. cancer - 208,652
31. [risk factors](https://academic.microsoft.com/#/search?q=risk factors&iq=%2540risk factors%2540&filters=&from=0&sort=0) - 207,986
32. [x ray diffraction](https://academic.microsoft.com/#/search?q=x ray diffraction&iq=%2540x ray diffraction%2540&filters=&from=0&sort=0) - 205,406
33. [crystal structure](https://academic.microsoft.com/#/search?q=crystal structure&iq=%2540crystal structure%2540&filters=&from=0&sort=0) - 204,879
34. satisfiability - 200,346
35. mathematics - 196,977
36. thermodynamics - 195,849
37. biotechnology - 193,032
38. temperature - 191,481
39. chemistry - 191,432
40. [gene expression](https://academic.microsoft.com/#/search?q=gene expression&iq=%2540gene expression%2540&filters=&from=0&sort=0) - 185,834
41. [room temperature](https://academic.microsoft.com/#/search?q=room temperature&iq=%2540room temperature%2540&filters=&from=0&sort=0) - 183,766
42. environment - 181,565
43. [real time](https://academic.microsoft.com/#/search?q=real time&iq=%2540real time%2540&filters=&from=0&sort=0) - 181,021
44. microstructures - 179,956
45. [public health](https://academic.microsoft.com/#/search?q=public health&iq=%2540public health%2540&filters=&from=0&sort=0) - 179,075
46. publishing - 178,056
47. [high resolution](https://academic.microsoft.com/#/search?q=high resolution&iq=%2540high resolution%2540&filters=&from=0&sort=0) - 177,266
48. [cell line](https://academic.microsoft.com/#/search?q=cell line&iq=%2540cell line%2540&filters=&from=0&sort=0) - 175,158
49. simulation - 174,505
50. engineering - 172,942
51. internet - 172,592
52. apoptosis - 171,952
53. agriculture - 170,323
54. [amino acid](https://academic.microsoft.com/#/search?q=amino acid&iq=%2540amino acid%2540&filters=&from=0&sort=0) - 169,489
55. infrared - 169,464
56. obesity - 167,196
57. epidemiology - 166,894
58. [steady state](https://academic.microsoft.com/#/search?q=steady state&iq=%2540steady state%2540&filters=&from=0&sort=0) - 166,661
59. [chemical reaction](https://academic.microsoft.com/#/search?q=chemical reaction&iq=%2540chemical reaction%2540&filters=&from=0&sort=0) - 166,113
60. [climate change](https://academic.microsoft.com/#/search?q=climate change&iq=%2540climate change%2540&filters=&from=0&sort=0) - 165,297
61. statistics - 164,992
62. seasonality - 164,331
63. [numerical simulation](https://academic.microsoft.com/#/search?q=numerical simulation&iq=%2540numerical simulation%2540&filters=&from=0&sort=0) - 160,715
64. [materials science](https://academic.microsoft.com/#/search?q=materials science&iq=%2540materials science%2540&filters=&from=0&sort=0) - 159,503
65. [electric field](https://academic.microsoft.com/#/search?q=electric field&iq=%2540electric field%2540&filters=&from=0&sort=0) - 159,212
66. testing - 158,349
67. [statistical analysis](https://academic.microsoft.com/#/search?q=statistical analysis&iq=%2540statistical analysis%2540&filters=&from=0&sort=0) - 152,828
68. [computer simulation](https://academic.microsoft.com/#/search?q=computer simulation&iq=%2540computer simulation%2540&filters=&from=0&sort=0) - 152,742
69. [cell cycle](https://academic.microsoft.com/#/search?q=cell cycle&iq=%2540cell cycle%2540&filters=&from=0&sort=0) - 151,380
70. [single crystal](https://academic.microsoft.com/#/search?q=single crystal&iq=%2540single crystal%2540&filters=&from=0&sort=0) - 151,208
71. optimization - 151,145
72. nickel - 150,057
73. [physical properties](https://academic.microsoft.com/#/search?q=physical properties&iq=%2540physical properties%2540&filters=&from=0&sort=0) - 150,031
74. [signal transduction](https://academic.microsoft.com/#/search?q=signal transduction&iq=%2540signal transduction%2540&filters=&from=0&sort=0) - 149,892
75. design - 148,610
76. [data mining](https://academic.microsoft.com/#/search?q=data mining&iq=%2540data mining%2540&filters=&from=0&sort=0) - 148,020
77. [mathematical models](https://academic.microsoft.com/#/search?q=mathematical models&iq=%2540mathematical models%2540&filters=&from=0&sort=0) - 147,438
78. [chemical composition](https://academic.microsoft.com/#/search?q=chemical composition&iq=%2540chemical composition%2540&filters=&from=0&sort=0) - 147,438
79. [escherichia coli](https://academic.microsoft.com/#/search?q=escherichia coli&iq=%2540escherichia coli%2540&filters=&from=0&sort=0) - 146,743
80. zinc - 143,014
81. [quantum mechanics](https://academic.microsoft.com/#/search?q=quantum mechanics&iq=%2540quantum mechanics%2540&filters=&from=0&sort=0) - 142,616
82. ecology - 137,861
83. economics - 136,692
84. [heat transfer](https://academic.microsoft.com/#/search?q=heat transfer&iq=%2540heat transfer%2540&filters=&from=0&sort=0) - 133,496
85. stability - 132,877
86. [breast cancer](https://academic.microsoft.com/#/search?q=breast cancer&iq=%2540breast cancer%2540&filters=&from=0&sort=0) - 132,851
87. dna - 132,459
88. algorithms - 131,587
89. potassium - 131,297
90. [data collection](https://academic.microsoft.com/#/search?q=data collection&iq=%2540data collection%2540&filters=&from=0&sort=0) - 129,991
91. frequency - 129,881
92. immunology - 127,795
93. [teaching methods](https://academic.microsoft.com/#/search?q=teaching methods&iq=%2540teaching methods%2540&filters=&from=0&sort=0) - 127,142
94. [remote sensing](https://academic.microsoft.com/#/search?q=remote sensing&iq=%2540remote sensing%2540&filters=&from=0&sort=0) - 126,897
95. phosphorus - 125,845
96. veterinary - 123,708
97. polymorphism - 123,335
98. [elementary particles](https://academic.microsoft.com/#/search?q=elementary particles&iq=%2540elementary particles%2540&filters=&from=0&sort=0) - 123,305
99. commissioning - 123,260
100. [academic research](https://academic.microsoft.com/#/search?q=academic research&iq=%2540academic research%2540&filters=&from=0&sort=0) - 122,516

x-count-lines.js

// The code that was used to count words. To run:
// node --max-old-space-size=14000 x-count-lines.js ~/Downloads/PaperKeywords/PaperKeywords.txt
var fs = require('fs');

var fileName = process.argv[2];
var readline = require('readline');

var lineReader = readline.createInterface({
  input: fs.createReadStream(fileName)
});
var count = 0;
var counter = Object.create(null);

lineReader.on('line', function (line) {
  if (!line || line[0] === '#') return; // skip comments
  count++;

  var parts = line.split('\t');
  if (count % 100000 === 0) {
    dumpStats();
  }
  var keyword = parts[1];
  var value = counter[keyword];
  if (value === undefined) counter[keyword] = 1;
  else counter[keyword] = value + 1;
});

lineReader.on('close', function () {
  Object.keys(counter).sort((x, y) => counter[y] - counter[x]).slice(0, 100).forEach(
    x => {
      console.log(x, counter[x]);
    })
});

function dumpStats(argument) {
  console.log('processed: ', count);
}