| 1 | signal to noise | S/N | 27 | 8 | 1.000365 | 0007030,0007063,etc |
| 2 | proportional counter array | PCA | 81 | 7 | 2.000989 | 0007092,0007250,etc |
| 3 | kolmogorov smirnov | KS | 26 | 6 | 1.000487 | 0007219,0007030,etc |
| 4 | wide field planetary camera 2 | WFPC2 | 67 | 6 | 1.000706 | 0007114,0007228,etc |
| 5 | goddard high resolution spectrograph | GHRS | 49 | 5 | 1.001669 | 0007236,0007238,etc |
| 6 | low surface brightness | LSB | 47 | 5 | 1.001135 | 0007318,0007221,etc |
| 7 | colour magnitude diagram | CMD | 67 | 5 | 2.001757 | 0007394,0007442,etc |
| 8 | wolf rayet | WR | 155 | 5 | 2.00671 | 0007385,0007417,etc |
| 9 | space telescope imaging spectrograph | STIS | 27 | 5 | 1.000819 | 0007330,0007238,etc |
| 10 | wide field camera | WFC | 23 | 4 | 1.002151 | 0007280,0007320,etc |
| 11 | narrow field instruments | NFI | 17 | 4 | 1.000873 | 0007280,0007320,etc |
| 12 | high resolution imager | HRI | 53 | 4 | 2.000592 | 0007350,0007468,etc |
| 13 | wide field and planetary camera 2 | WFPC2 | 8 | 3 | 1.000219 | 0007219,0007358,etc |
| 14 | quasi periodic brightness oscillation | QPO | 106 | 3 | 2.003767 | 0007287,0007234,etc |
| 15 | near infrared camera and multi object spectrometer | NICMOS | 40 | 3 | 2.003903 | 0007286,0007330,etc |
| 16 | power density spectrum | PDS | 37 | 3 | 2.003785 | 0007092,0007250,etc |
| 17 | space interferometry mission | SIM | 27 | 3 | 2.001606 | 0007160,0007166,etc |
| 18 | all sky monitor | ASM | 5 | 3 | 1.000194 | 0007071,0007274,etc |
| 19 | charge transfer efficiency | CTE | 4 | 3 | 1.000202 | 0007150,0007001,etc |
| 20 | dwarf spheroidal | dSph | 23 | 3 | 1.002098 | 0007006,0007001,etc |
| 21 | dwarf irregular | dIrr | 26 | 3 | 2.000744 | 0007006,0007417,etc |
| 22 | dwarf elliptical | dE | 15 | 3 | 2.000302 | 0007001,0007417,etc |
| 23 | the red giant branch | TRGB | 80 | 3 | 1.002104 | 0007001,0007417,etc |
| 24 | local interstellar medium | LISM | 78 | 3 | 2.002501 | 0007238,0007172,etc |