**EXHIBIT 31(i).1**

CERTIFICATIONS

          I, A.L. Giannopoulos, certify that: 

1.       I have reviewed this Quarterly Report on Form 10-Q of MICROS Systems, Inc.;

2.       Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3.       Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.       The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

|   | a) Designed such disclosure controls and procedures, or caused such   disclosure controls and procedures to be designed under our supervision, to   ensure that material information relating to the registrant, including its   consolidated subsidiaries, is made known to us by others within those   entities, particularly during the period in which this report is being   prepared; |
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|   | b) Designed such internal control over financial reporting, or caused   such internal control over financial reporting to be designed under our   supervision, to provide reasonable assurance regarding the reliability of   financial reporting and the preparation of financial statements for external   purposes in accordance with generally accepted accounting principles;          |
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|   | c) Evaluated the effectiveness of the registrant’s disclosure   controls and procedures and presented in this report our conclusions about   the effectiveness of the disclosure controls and procedures, as of the end of   the period covered by this report based on such evaluation; and                                                                                           |
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|   | d) Disclosed in this report any change in the registrant’s internal   control over financial reporting that occurred during the registrant’s most   recent fiscal quarter that has materially affected, or is reasonably likely   to materially affect, the registrant’s internal control over financial   reporting; and                                                    |

5.       The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

|   | a) All significant deficiencies and material weaknesses in the design   or operation of internal control over financial reporting which are   reasonably likely to adversely affect the registrant’s ability to record,   process, summarize and report financial information; and |
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|   | b) Any fraud, whether or not material, that involves management or   other employees who have a significant role in the registrant’s internal   control over financial reporting.                                                                                                  |

| Date:   February 8, 2007 | /s/ A.L.   Giannopoulos   |
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|                     | A.L.   Giannopoulos       |
|                     | Chairman,   President and |
|                     | Chief   Executive Officer |