<TABLE> <S> <C>

<PAGE>

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<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAY-31-2001
<PERIOD-START>                             JUN-01-2000
<PERIOD-END>                               NOV-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                          74,220
<SECURITIES>                                         0
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<DEPRECIATION>                               3,092,951
<TOTAL-ASSETS>                               4,748,081
<CURRENT-LIABILITIES>                          946,199
<BONDS>                                              0
                                0
                                          0
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<OTHER-SE>                                   3,645,887
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<TOTAL-REVENUES>                             6,002,930
<CGS>                                           10,663
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<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              27,352
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<INCOME-TAX>                                    80,000
<INCOME-CONTINUING>                            119,452
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   119,452
<EPS-BASIC>                                        .14
<EPS-DILUTED>                                      .13


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