Exhibit 1 International Business Machines Corporation Adjustments to GAAP Net Income, Gross Profit Margin, S,G&A, R,D&E, and Diluted Earnings Per Share (Unaudited, Dollars in millions except per share amounts) GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 9,976 5,677 1,509 3,515 2,601 1.97 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 10,809 5,061 1,475 4,575 3,386 2.61 First Quarter 2010 Acquisition-related Retirement-related Adjustments Adjustments $ $ 55 (61) 116 82 0.06 $ $ (35) 10 30 (76) (45) (0.03) Operating (Non-GAAP) $ $ Second Quarter 2010 Acquisition-related Retirement-related Adjustments Adjustments $ $ 58 (62) 122 84 0.06 $ $ (56) 25 32 (113) (68) (0.05) 9,996 5,626 1,539 3,556 2,638 2.00 Operating (Non-GAAP) $ $ 10,811 5,024 1,507 4,584 3,402 2.62 Exhibit 1 (cont) International Business Machines Corporation Adjustments to GAAP Net Income, Gross Profit Margin, S,G&A, R,D&E, and Diluted Earnings Per Share (Unaudited, Dollars in millions except per share amounts) GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 9,431 5,264 1,480 3,122 2,295 1.70 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 10,581 5,115 1,434 4,262 3,103 2.32 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 10,627 5,013 1,446 4,373 3,214 2.40 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 13,145 5,560 1,461 6,381 4,813 3.59 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 43,785 20,952 5,820 18,138 13,425 10.01 First Quarter 2009 Acquisition-related Retirement-related Adjustments Adjustments $ $ 52 (73) 125 90 0.07 $ $ (45) 24 26 (94) (61) (0.05) Operating (Non-GAAP) $ $ Second Quarter 2009 Acquisition-related Retirement-related Adjustments Adjustments $ $ 49 (73) 122 86 0.06 $ $ (77) 34 35 (145) (95) (0.07) Operating (Non-GAAP) $ $ Third Quarter 2009 Acquisition-related Retirement-related Adjustments Adjustments $ $ 50 (74) 124 89 0.07 $ $ (59) 31 31 (121) (79) (0.06) $ 53 (72) 127 92 0.07 $ $ (80) 38 30 (149) (95) (0.07) $ $ $ 204 (293) 498 357 0.27 $ $ (259) 127 123 (509) (330) (0.25) 10,618 4,969 1,477 4,375 3,224 2.41 Operating (Non-GAAP) $ $ Full Year 2009 Acquisition-related Retirement-related Adjustments Adjustments $ 10,554 5,076 1,469 4,239 3,094 2.31 Operating (Non-GAAP) Fourth Quarter 2009 Acquisition-related Retirement-related Adjustments Adjustments $ 9,438 5,214 1,506 3,153 2,324 1.72 13,119 5,526 1,491 6,359 4,810 3.59 Operating (Non-GAAP) $ $ 43,730 20,787 5,943 18,126 13,452 10.03 Exhibit 1 (cont) International Business Machines Corporation Adjustments to GAAP Net Income, Gross Profit Margin, S,G&A, R,D&E, and Diluted Earnings Per Share (Unaudited, Dollars in millions except per share amounts) GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 10,166 5,620 1,569 3,198 2,319 1.64 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 11,599 6,289 1,660 3,814 2,765 1.97 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 10,959 5,644 1,579 3,895 2,824 2.04 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 12,936 5,832 1,528 5,808 4,427 3.27 GAAP Gross profit S,G&A R,D&E Pre-tax income Net income Diluted Earnings Per Share $ $ 45,661 23,386 6,337 16,715 12,334 8.89 First Quarter 2008 Acquisition-related Retirement-related Adjustments Adjustments $ $ 46 (69) 115 82 0.06 $ $ (69) 26 26 (121) (76) (0.05) Operating (Non-GAAP) $ $ Second Quarter 2008 Acquisition-related Retirement-related Adjustments Adjustments $ $ 58 (83) (24) 165 129 0.09 $ $ (79) 32 29 (140) (77) (0.05) Operating (Non-GAAP) $ $ Third Quarter 2008 Acquisition-related Retirement-related Adjustments Adjustments $ $ 55 (79) 134 90 0.07 $ $ (73) 32 27 (132) (93) (0.07) $ 55 (75) 130 96 0.07 $ $ (176) 90 31 (297) (193) (0.14) $ $ $ 214 (306) (24) 544 397 0.29 $ $ (398) 179 113 (691) (439) (0.32) 10,941 5,596 1,606 3,897 2,821 2.04 Operating (Non-GAAP) $ $ Full Year 2008 Acquisition-related Retirement-related Adjustments Adjustments $ 11,578 6,237 1,665 3,839 2,817 2.01 Operating (Non-GAAP) Fourth Quarter 2008 Acquisition-related Retirement-related Adjustments Adjustments $ 10,143 5,578 1,596 3,191 2,325 1.65 12,814 5,847 1,559 5,642 4,330 3.20 Operating (Non-GAAP) $ $ 45,477 23,259 6,426 16,569 12,293 8.86 (Amounts may not add due to rounding) (The tax impact on the Non-GAAP (Operational) Pre-tax income will be calculated under the same accounting principles applied to the As Reported Pre-tax income under ACS 740, which employs an annual effective tax rate concept to the results.) Exhibit 2 International Business Machines Corporation Adjustments to Segment Pre-tax Income (Unaudited, Dollars in millions) Global Services Global Global Technology Business Services Services Systems and Technology Software Global Financing Total Segments 1Q10: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 9,306 320 9,626 964 10.0% $ 4,410 203 4,613 445 9.7% $ 5,018 758 5,776 2,052 35.5% $ 3,385 173 3,559 (170) -4.8% 5 (12) 3 (3) 108 (32) 1 (28) 957 9.9% 445 9.7% 2,127 36.8% (197) -5.5% $ 537 403 941 427 45.4% $ - 22,657 1,858 24,515 3,719 15.2% 116 (76) 427 45.4% 3,760 15.3% 2Q10: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin $ 9,234 332 9,566 1,422 14.9% $ 4,483 197 4,680 683 14.6% $ 5,277 690 5,967 1,988 33.3% $ 3,985 202 4,187 221 5.3% $ 544 431 975 463 47.4% $ 23,523 1,852 25,376 4,777 18.8% 4 (27) 6 (11) 113 (39) (1) (35) (1) 122 (113) 1,399 14.6% 678 14.5% 2,062 34.5% 185 4.4% 462 47.3% 4,786 18.9% Exhibit 2 (cont) International Business Machines Corporation Adjustments to Segment Pre-tax Income (Unaudited, Dollars in millions) Global Services Global Global Technology Business Services Services Systems and Technology Software Global Financing Total Segments 1Q09: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin $ 8,754 342 9,096 1,104 12.1% $ 4,397 232 4,629 521 11.3% $ 4,539 614 5,153 1,335 25.9% $ 3,228 176 3,404 28 0.8% $ 578 390 968 360 37.2% $ 21,498 1,754 23,251 3,348 14.4% 18 (18) 8 (13) 98 (35) 1 (27) 0 (1) 125 (94) 1,104 12.1% 516 11.2% 1,398 27.1% 2 0.1% 359 37.1% 3,379 14.5% 9,108 343 9,451 1,405 14.9% 4,338 223 4,562 608 13.3% 5,166 614 5,780 1,852 32.0% 3,855 244 4,098 333 8.1% 568 447 1,014 465 45.8% 23,035 1,870 24,905 4,663 18.7% 18 (40) 8 (21) 95 (47) 1 (36) 0 (1) 122 (145) 1,383 14.6% 595 13.1% 1,899 32.9% 299 7.3% 463 45.7% 4,640 18.6% 9,434 355 9,789 1,471 15.0% 4,338 214 4,552 659 14.5% 5,114 656 5,770 1,850 32.1% 3,917 260 4,177 225 5.4% 536 419 955 408 42.7% 23,339 1,904 25,243 4,614 18.3% 18 (29) 8 (17) 96 (40) 1 (34) 0 (1) 124 (121) 1,461 14.9% 651 14.3% 1,906 33.0% 192 4.6% 407 42.6% 4,616 18.3% 10,051 347 10,398 1,556 15.0% 4,579 217 4,796 766 16.0% 6,577 793 7,370 3,058 41.5% 5,190 232 5,422 832 15.4% 621 518 1,139 497 43.6% 27,017 2,108 29,125 6,710 23.0% 18 (41) 4 (32) 104 (46) 1 (28) 0 (2) 127 (149) 1,534 14.8% 737 15.4% 3,116 42.3% 805 14.9% 495 43.5% 6,688 23.0% 37,347 1,386 38,734 5,537 14.3% 17,653 887 18,540 2,555 13.8% 21,396 2,677 24,073 8,095 33.6% 16,190 911 17,102 1,419 8.3% 2,302 1,774 4,076 1,730 42.4% 94,889 7,635 102,524 19,335 18.9% 73 (127) 29 (83) 393 (169) 4 (124) 0 (6) 498 (509) 5,482 14.2% 2,501 13.5% 8,319 34.6% 1,298 7.6% 1,724 42.3% 19,323 18.8% 2Q09: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 3Q09: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 4Q09: External revenue Internal revenue Total revenue Pre-tax Income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin FY 2009: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin Exhibit 2 (cont) International Business Machines Corporation Adjustments to Segment Pre-tax Income (Unaudited, Dollars in millions) Global Services Global Global Technology Business Services Services Systems and Technology Software Global Financing Total Segments 1Q08: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 9,677 388 10,065 988 9.8% $ 4,911 258 5,169 579 11.2% $ 4,847 667 5,514 1,267 23.0% $ 4,219 195 4,414 145 3.3% $ 633 386 1,019 388 38.1% $ 24,286 1,894 26,180 3,368 12.9% 21 (47) 10 (10) 84 (33) (31) (1) 115 (121) 962 9.6% 580 11.2% 1,318 23.9% 115 2.6% 387 38.0% 3,361 12.8% 2Q08: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 10,100 390 10,489 994 9.5% $ 5,107 259 5,366 637 11.9% $ 5,574 719 6,293 1,492 23.7% $ 5,212 215 5,427 400 7.4% $ 634 525 1,159 428 36.9% $ 26,626 2,108 28,734 3,951 13.8% 21 (44) 10 (22) 107 (36) 26 (36) (1) 165 (140) 971 9.3% 625 11.6% 1,564 24.8% 390 7.2% 427 36.8% 3,976 13.8% 3Q08: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 9,864 384 10,248 1,189 11.6% $ 4,900 259 5,160 724 14.0% $ 5,249 655 5,904 1,527 25.9% $ 4,431 223 4,654 283 6.1% $ 633 456 1,090 349 32.0% $ 25,077 1,978 27,055 4,072 15.1% 21 (41) 9 (21) 103 (35) 1 (34) (1) 134 (132) 1,169 11.4% 712 13.8% 1,595 27.0% 250 5.4% 348 31.9% 4,074 15.1% 4Q08: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin 9,623 383 10,007 1,437 14.4% $ 4,709 267 4,977 740 14.9% $ 6,420 720 7,139 2,789 39.1% $ 5,425 249 5,674 722 12.7% 21 (101) 8 (76) 100 (62) 1 (54) 1,356 13.6% 672 13.5% 2,828 39.6% 669 11.8% $ 660 525 1,184 452 38.2% $ - 26,837 2,144 28,981 6,140 21.2% (4) 130 (297) 448 37.8% 5,973 20.6% FY 2008: External revenue Internal revenue Total revenue Pre-tax income Pre-tax income margin Non-operating adjustments: Acquisition-related Retirement-related Operating pre-tax income Operating pre-tax income margin (Amounts may not add due to rounding) $ 39,264 1,546 40,810 4,607 11.3% $ 19,628 1,044 20,671 2,681 13.0% $ 22,089 2,761 24,850 7,075 28.5% $ 19,287 882 20,169 1,550 7.7% $ 2,559 1,892 4,451 1,617 36.3% $ 102,827 8,125 110,951 17,531 15.8% 84 (234) 38 (129) 395 (166) 28 (155) (7) 544 (691) 4,458 10.9% 2,589 12.5% 7,304 29.4% 1,423 7.1% 1,610 36.2% 17,384 15.7% Exhibit 3 International Business Machines Corporation Adjustments to Segment Gross Profit (Unaudited, Dollars in millions except per share amounts) Global Services Global Global Business Technology Services Services Systems and Technology Software Global Financing Total Segments 1Q10: External revenue External gross profit External gross profit margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 9,306 3,197 34.4% $ 4,410 1,202 27.3% $ 5,018 4,244 84.6% $ 3,385 1,137 33.6% 1 (12) 0 (4) 53 (3) 0 (16) 3,186 34.2% 1,199 27.2% 4,294 85.6% 1,122 33.1% $ 537 267 49.8% $ - 22,657 10,048 44.3% 55 (35) 0 267 49.8% 10,067 44.4% 2Q10: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin $ 9,234 3,191 34.6% $ 4,483 1,277 28.5% $ 5,277 4,595 87.1% $ 3,985 1,439 36.1% 2 (24) 0 (11) 56 (5) 0 (16) 3,168 34.3% 1,266 28.2% 4,647 88.1% 1,423 35.7% $ 544 273 50.1% 0 273 50.1% $ 23,523 10,773 45.8% 58 (56) 10,776 45.8% Exhibit 3 (cont) International Business Machines Corporation Adjustments to Segment Gross Profit (Unaudited, Dollars in millions except per share amounts) Global Services Global Global Business Technology Services Services Systems and Technology Software Global Financing Total Segments 1Q09: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin $ 8,754 2,968 33.9% $ 4,397 1,166 26.5% $ 4,539 3,822 84.2% $ 3,228 1,097 34.0% $ 578 265 45.9% - $ 21,498 9,319 43.3% 8 (14) (13) 44 (5) 0 (13) 2,962 33.8% 1,154 26.2% 3,862 85.1% 1,084 33.6% 265 45.9% 9,327 43.4% 9,108 3,167 34.8% 4,338 1,178 27.2% 5,166 4,436 85.9% 3,855 1,431 37.1% 568 268 47.1% 23,035 10,479 45.5% 8 (33) (19) 41 (7) 0 (17) 3,142 34.5% 1,159 26.7% 4,471 86.5% 1,413 36.7% 268 47.1% 10,452 45.4% 9,434 3,349 35.5% 4,338 1,245 28.7% 5,114 4,381 85.7% 3,917 1,395 35.6% 536 238 44.4% 23,339 10,608 45.5% 8 (22) (15) 41 (6) 0 (15) 3,335 35.4% 1,230 28.4% 4,417 86.4% 1,379 35.2% 238 44.4% 10,600 45.4% 10,051 3,597 35.8% 4,579 1,389 30.3% 6,577 5,765 87.7% 5,190 2,205 42.5% 621 323 52.0% 27,017 13,279 49.1% 9 (33) (30) 44 (5) 0 (12) 3,574 35.6% 1,359 29.7% 5,804 88.2% 2,192 42.2% 323 52.0% 13,253 49.1% 37,347 13,081 35.0% 17,653 4,979 28.2% 21,396 18,405 86.0% 16,190 6,127 37.8% 2,302 1,093 47.5% 94,889 43,685 46.0% 34 (102) (77) 170 (22) 0 (58) 13,014 34.8% 4,902 27.8% 18,553 86.7% 6,069 37.5% 0 52 (45) 2Q09: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 0 49 (77) 3Q09: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 0 50 (59) 4Q09: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 0 53 (80) FY 2009: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 0 1,093 47.5% 204 (259) 43,631 46.0% Exhibit 3 (cont) International Business Machines Corporation Adjustments to Segment Gross Profit (Unaudited, Dollars in millions except per share amounts) Global Services Global Global Business Technology Services Services Systems and Technology Software Global Financing Total Segments 1Q08: External revenue External gross profit External gross profit margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 9,677 3,032 31.3% $ 4,911 1,228 25.0% $ 4,847 4,066 83.9% $ 4,219 1,562 37.0% 8 (41) 0 (9) 38 (5) 0 (14) 2,998 31.0% 1,219 24.8% 4,099 84.6% 1,548 36.7% $ 633 321 50.8% $ - 24,286 10,209 42.0% 46 (69) 0 321 50.8% 10,186 41.9% 2Q08: External revenue External gross profit External gross profit margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 10,100 3,189 31.6% $ 5,107 1,318 25.8% $ 5,574 4,717 84.6% $ 5,212 2,013 38.6% 8 (38) 0 (22) 50 (5) 0 (15) 3,160 31.3% 1,297 25.4% 4,762 85.4% 1,998 38.3% $ 634 351 55.3% $ - 26,626 11,589 43.5% 58 (79) 0 351 55.4% 11,567 43.4% 3Q08: External revenue External gross profit External gross profit margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 9,864 3,222 32.7% $ 4,900 1,342 27.4% $ 5,249 4,447 84.7% $ 4,431 1,602 36.2% 8 (34) 0 (20) 47 (5) 0 (15) 3,197 32.4% 1,322 27.0% 4,489 85.5% 1,588 35.8% $ 633 311 49.1% $ - 25,077 10,924 43.6% 55 (73) 0 311 49.1% 10,906 43.5% 4Q08: External revenue External gross profit External gross profit margin $ Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin 9,623 3,359 34.9% $ 4,709 1,349 28.7% $ 6,420 5,629 87.7% $ 5,425 2,164 39.9% 8 (79) (65) 46 (12) (21) 3,288 34.2% 1,284 27.3% 5,665 88.2% 2,144 39.5% $ 660 329 50.0% $ 0 0 26,837 12,831 47.8% 55 (176) 329 50.0% 12,711 47.4% FY 2008: External revenue External gross profit External gross profit margin Non-operating adjustments: Acquisition-related Retirement-related Operating gross profit Operating gross profit margin (Amounts may not add due to rounding) $ 39,264 12,802 32.6% $ 19,628 5,238 26.7% $ 22,089 18,859 85.4% $ 19,287 7,341 38.1% 33 (192) 0 (116) 181 (27) 0 (64) 12,643 32.2% 5,122 26.1% 19,015 86.1% 7,277 37.7% $ 2,559 1,313 51.3% 0 1,313 51.3% $ 102,827 45,553 44.3% 214 (398) 45,370 44.1%