GAAP TO NON-GAAP RECONCILIATION (CONTINUED)

(Dollars in thousands, except per share data)

(Unaudited)

First Quarter of

2013

2012

% of Segment

% of Segment

SEGMENT OPERATING INCOME:

Revenue

Revenue

Engineering and Construction

GAAP operating income before corporate allocations:

$ 42,973

16.1%

$ 40,077

16.1%

Stock-based compensation

( I )

2,862

1.1%

2,756

1.1%

Non-GAAP operating income before corporate allocations:

$ 45,835

17.2%

$ 42,833

17.2%

Field Solutions

GAAP operating income before corporate allocations:

$ 59,526

40.4%

$ 62,361

42.3%

Stock-based compensation

( I )

717

0.4%

643

0.4%

Non-GAAP operating income before corporate allocations:

$ 60,243

40.8%

$ 63,004

42.7%

Mobile Solutions

GAAP operating income before corporate allocations:

$ 11,573

10.5%

$   7,358

9.4%

Stock-based compensation

( I )

912

0.8%

793

1.0%

Non-GAAP operating income before corporate allocations:

$ 12,485

11.3%

$   8,151

10.4%

Advanced Devices

GAAP operating income before corporate allocations:

$   6,485

20.5%

$   3,339

12.1%

Stock-based compensation

( I )

849

2.7%

632

2.3%

Non-GAAP operating income before corporate allocations:

$   7,334

23.2%

$   3,971

14.4%