The three heads of the armed forces have also been present for some of the meetings.
Indeed, in that field no fewer than three heads have sometimes been visible.
But now the question becomes different: Is the Hadoop Apache Project with its three heads the only way to create that capability?
Though still classic in design (some have two and three heads to make veins and layers), the length and type of hair for the brushes have been changed to accommodate water-based paint, which the industry has embraced in place of oil-based paint.
The good news is that despite the divergent approaches of the different open core heads, there is really one set of Hadoop APIs that all three heads agree on (for now) and that are the foundation of a thriving ecosystem of projects.
The Chair reiterated that she had herself expressed the value and importance of more regular communications between the Director-General and herself, and that it was necessary to recall that these meetings of the three Heads could (and should) be triggered immediately on matters of such critical importance.
By the time McKeon gavelled his meeting to order, just after ten in the morning, only seventeen members of the House Armed Services Committee (five Democrats and twelve Republicans) had shown up to hear the three former heads of the Joint Chiefs of Staff who had been called to testify.
It is possible that Adam Jones, one of the three tight-heads in the squad, could do a shift there but if either Gethin Jenkins or Andrew Sheridan start, it could point to the other being the likely Test starter.
For Detroit's big three, keeping their heads above the new wave of competition from Asia will prove just as stern a test.
Dame Thora picked up two of her three Baftas for her Talking Heads monologues, written by Alan Bennett.
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Three boats with fierce dragon heads at the helm cut through the water.
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Before the reception, the heads of the three schools singled out by the prime minister gave presentations on school improvement.
In 2004 it reshuffled the heads of the three biggest telecoms companies.
Because we recognized these dangers, in December, Secretary Chu and I met at the White House with the heads of the three nuclear weapons labs.
Alongside the National Security Council discussions there have been separate talks within the Ministry of Defence (MoD) itself, involving the heads of the three armed services - the Royal Navy, the Army and the RAF.
The Heads of the three constitutional organs of UNESCO, the Director-General, Ms Irina Bokova, the President of the General Conference, Ms Katalin Bogyay and the Chairperson of the Executive Board, Ms Alissandra Cummins, met for the third of their henceforth regular meetings on Tuesday 11 December last.
The bodies get pretzelled together, limbs and heads intertwined, the three men working as a unit.
For three decades, developers scratched their heads over what to do with the massive Art Deco structure and its four towering chimneys.
Deprived of a raft of senior players including goalkicking king Jonny Wilkinson, they lacked the experienced heads to close out three tight matches.
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Last week, the heads of the Big Three--General Motors, Ford Motor and DaimlerChrysler--pushed back, claiming that achieving those increases in corporate average fuel economy (CAFE) is too costly.
So the 44-year-old, who says his peers' evaluations were somewhat harsh, recently rejoined the local gym, where he heads after work at least three days a week to run on the treadmill, cycle or stretch.
In February, the heads of China's three state-controlled oil and gas majors -- China National Petroleum Corp (CNPC), Sinopec and China National Offshore Oil Corp (CNOOC) -- met one of Russia's most influential players in the energy sector, Igor Sechin, chief executive of state-owned oil company Rosneft.
The four heads said it would take about three months to do a thorough review.
The heads of state and government reached three key agreements on bailout funds, moves towards banking union, and on growth.
The three-hour route starts at Paddington Station and heads west along Westway, passing just north of Heathrow airport and into the quieter, less crowded county of Berkshire.
From the peasant destitution in which they were sunk to the very petit bougeois pleasures of three meals a day and a roof over their heads.
Verifying the system would take at least three weeks, according to Eduardo Stein, who heads a team of election observers from the Organisation of American States.
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Huge swathes of our fellow humans are moving from destitution to the petit bourgeois pleasures of a roof over their heads, a change of clothes and three squares a day.
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Federer leads Djokovic 13-6 in head-to-heads and the Swiss has won the last three meetings.
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In Mid and West Wales, where Mr Michael heads his party list, Labour already has three safe seats.
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