13G Filing: Penbrook Management and Data I/O Corp (DAIO)

Page 5 of 13 SEC Filing

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1. NAME OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

Robert S. Anderson
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2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a) |x|
(b) |_|
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3. SEC USE ONLY

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4. CITIZENSHIP OR PLACE OF ORGANIZATION

US Citizen
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NUMBER OF 5. SOLE VOTING POWER

SHARES 51,300
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BENEFICIALLY 6. SHARED VOTING POWER

OWNED BY 110,000
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EACH 7. SOLE DISPOSITIVE POWER

REPORTING 51,300
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PERSON 8. SHARED DISPOSITIVE POWER

WITH 469,090
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
520,390
(Reporting person disclaims beneficial ownership of shares managed by
Penbrook Management, LLC on behalf of its investment advisory clients
and disclaims beneficial ownership of shares held by AnKap Partners, L.P.
which represent the interest of the other partners of AnKap Partners,
L.P.)
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10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES*

|_|
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

6.55%
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12. TYPE OF REPORTING PERSON*

IN
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