( A )

Restructuring costs. Included in our GAAP presentation of cost of sales and operating expenses, restructuring costs recorded are primarily for employee compensation resulting from reductions in employee headcount in connection with our company restructurings.  We exclude restructuring costs from our non-GAAP measures because we believe they do not reflect expected future operating expenses, they are not indicative of our core operating performance, and they are not meaningful in comparisons to our past operating performance.  We have incurred restructuring expense in each of the periods presented.  However the amount incurred can vary significantly based on whether a restructuring has occurred in the period and the timing of headcount reductions.

( B )

Amortization of purchased intangible assets.Included in our GAAP presentation of gross margin and operating expenses is amortization of purchased intangible assets. US GAAP accounting requires that intangible assets are recorded at fair value and amortized over their useful lives. Consequently, the timing and size of our acquisitions will cause our operating results to vary from period to period, making a comparison to past performance difficult for investors. This accounting treatment may cause differences when comparing our results to companies that grow internally because the fair value assigned to the intangible assets acquired through acquisition may significantly exceed the equivalent expenses that a company may incur for similar efforts when performed internally. Furthermore, the useful life that we expense our intangible assets over may be substantially different from the time period that an internal growth company incurs and recognizes such expenses. We believe that by excluding the amortization of purchased intangible assets, which primarily represents technology and/or customer relationships already developed, it provides an alternative way for investors to compare our operations pre-acquisition to those post-acquisitions and to those of our competitors that have pursued internal growth strategies. However, we note that companies that grow internally will incur costs to develop intangible assets that will be expensed in the period incurred, which may make a direct comparison more difficult.

( C )

Stock-based compensation.Included in our GAAP presentation of cost of sales and operating expenses, stock-based compensation consists of expenses for employee stock options and awards and purchase rights under our employee stock purchase plan. We exclude stock-based compensation expense from our non-GAAP measures because some investors may view it as not reflective of our core operating performance as it is a non-cash expense.   For the third quarter and the first three quarters of fiscal years 2016 and 2015, stock-based compensation was allocated as follows:

Third Quarter of

First Three Quarters of

(Dollars in millions)

2016

2016

2015

Cost of sales

$    0.9

$    1.0

$    2.8

$    2.9

Research and development

$    2.2

2.1

$    6.9

6.4

Sales and Marketing

$    2.1

2.2

$    6.3

6.7

General and administrative

$    8.1

7.5

$  24.0

21.3

$  13.3

$  12.8

$  40.0

$  37.3

( D )

Acquisition / divestiture items.   Included in our GAAP presentation of operating expenses, acquisition costs consist of external and incremental costs resulting directly from merger and acquisition and strategic investment activities such as legal, due diligence, and integration costs, as well as adjustments to the fair value of earn-out liabilities.  Included in our GAAP presentation of non-operating income (expense), net, acquisition / divestiture items includes unusual acquisition, investment, or divestiture gains/losses. Although we do numerous acquisitions, the costs that have been excluded from the non-GAAP measures are costs specific to particular acquisitions. These are one-time costs that vary significantly in amount and timing and are not indicative of our core operating performance.

( E )

Executive transition costs.  Included in our GAAP presentation of operating expenses are amounts paid to the Company's former CFO upon his departure under the terms of his executive severance agreement. We excluded these payments from our non-GAAP measures because they represent non-recurring expenses and are not indicative of our ongoing operating expenses. We further believe that excluding the executive transition costs from our non-GAAP results is useful to investors in that it allows for period-over-period comparability.

( F )

Non-GAAP items tax effected.   This amount adjusts the provision for income taxes to reflect the effect of the non-GAAP items ( A ) - ( F ) on non-GAAP net income.   We believe this information is useful to investors because it provides for consistent treatment of the excluded items in this non-GAAP presentation.

( G )

Difference in GAAP and Non-GAAP tax rate.    This amount represents the difference between the GAAP and Non-GAAP tax rates applied to the Non-GAAP operating income plus the Non-GAAP non-operating income (expense), net.

( H )

GAAP and non-GAAP tax rate %.  These percentages are defined as GAAP income tax provision as a percentage of GAAP income before taxes and non-GAAP income tax provision as a percentage of non-GAAP income before taxes.   We believe that investors benefit from a presentation of non-GAAP tax rate percentage as a way of facilitating a comparison to non-GAAP tax rates in prior periods.