| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of ibm mainframe computers | 1.76 | 1 | 2329 | 42 |
| ibm mainframe operating system history | 0.13 | 0.4 | 2931 | 25 |
| history of mainframe computers | 1.03 | 0.6 | 3014 | 16 |
| old ibm mainframe computers | 1.63 | 0.2 | 2115 | 39 |
| ibm mainframe computers 1980s | 0.99 | 0.1 | 4763 | 41 |
| ibm mainframe os history | 1.11 | 0.9 | 9973 | 70 |
| ibm mainframe model history | 1.73 | 1 | 8783 | 84 |
| ibm mainframe computer 1970 | 0.32 | 0.3 | 7338 | 22 |
| ibm mainframe history timeline | 1.31 | 1 | 3807 | 49 |
| ibm mainframe computers today | 0.81 | 0.4 | 1321 | 89 |
| when were mainframe computers invented | 0.52 | 0.1 | 8139 | 29 |
| latest ibm mainframe computer | 0.41 | 0.5 | 5038 | 28 |
| who invented mainframe computer and when | 0.52 | 0.2 | 5917 | 70 |
| when was the first mainframe computer made | 0.57 | 1 | 4074 | 94 |
| how old is ibm mainframe | 1.11 | 1 | 9739 | 100 |
| when was the mainframe invented | 0.99 | 0.1 | 6178 | 37 |
| first mainframe computer in the world | 1.8 | 1 | 6195 | 49 |
| which was an early mainframe computer | 1.71 | 0.2 | 7036 | 79 |
