Thank you for your contribution to this Twitter software project. In order to

clarify the intellectual property rights in the project, and to grant licenses

to the project to others, Twitter, Inc. ("Twitter") requires that you accept

this Contributor License Agreement ("Agreement"). This license is for your

protection as a Contributor as well as the protection of Twitter, its users, and

its licensees; you may still license your own Contributions under other terms.

You accept and agree to the following terms and conditions for Your present and

future Contributions submitted to Twitter. Except for the license granted herein

to Twitter and recipients of software distributed by Twitter, You reserve all

right, title, and interest in and to Your Contributions. **(If, however, you are

a current or former employee of Twitter, your rights and/or Contributions may be

governed by another agreement, including your Employee Invention Assignment, and

nothing in this Agreement shall be construed as modifying the terms of any other

such agreement.)**

1. Definitions.

"You" (or "Your") shall mean the copyright owner or legal entity authorized

by the copyright owner that is making this Agreement with Twitter. For legal

entities, the entity making a Contribution and all other entities that

control, are controlled by, or are under common control with that entity are

considered to be a single Contributor. For the purposes of this definition,

"control" means (i) the power, direct or indirect, to cause the direction or

management of such entity, whether by contract or otherwise, or (ii)

ownership of fifty percent (50%) or more of the outstanding shares, or (iii)

beneficial ownership of such entity.

"Contribution" shall mean any original work of authorship, including any

modifications or additions to an existing work, that is intentionally

submitted by You to Twitter for inclusion in, or documentation of, any of the

products owned or managed by Twitter (the "Work"). For the purposes of this

definition, "submitted" means any form of electronic, verbal, or written

communication sent to Twitter or its representatives, including but not

limited to communication on electronic mailing lists, source code control

systems, and issue tracking systems that are managed by, or on behalf of,

Twitter for the purpose of discussing and improving the Work, but excluding

communication that is conspicuously marked or otherwise designated in writing

by You as "Not a Contribution."

2. Grant of Copyright License. Subject to the terms and conditions of this

Agreement, You hereby grant to Twitter and to recipients of software

distributed by Twitter a perpetual, worldwide, non-exclusive, no-charge,

royalty-free, irrevocable copyright license to reproduce, prepare derivative

works of, publicly display, publicly perform, sublicense, and distribute Your

Contributions and such derivative works.

3. Grant of Patent License. Subject to the terms and conditions of this

Agreement, You hereby grant to Twitter and to recipients of software

distributed by Twitter a perpetual, worldwide, non-exclusive, no-charge,

royalty-free, irrevocable (except as stated in this section) patent license

to make, have made, use, offer to sell, sell, import, and otherwise transfer

the Work, where such license applies only to those patent claims licensable

by You that are necessarily infringed by Your Contribution(s) alone or by

combination of Your Contribution(s) with the Work to which such

Contribution(s) was submitted. If any entity institutes patent litigation

against You or any other entity (including a cross-claim or counterclaim in a

lawsuit) alleging that your Contribution, or the Work to which you have

contributed, constitutes direct or contributory patent infringement, then any

patent licenses granted to that entity under this Agreement for that

Contribution or Work shall terminate as of the date such litigation is filed.

4. You represent that you are legally entitled to grant the above license. If

your employer(s) has rights to intellectual property that you create that

includes your Contributions, you represent that you have received permission

to make Contributions on behalf of that employer, that your employer has

waived such rights for your Contributions to Twitter, or that your employer

has executed a separate Corporate CLA with Twitter.

5. You represent that each of Your Contributions is Your original creation (see

section 7 for submissions on behalf of others). You represent that Your

Contribution submissions include complete details of any third-party license

or other restriction (including, but not limited to, related patents and

trademarks) of which you are personally aware and which are associated with

any part of Your Contributions.

6. You are not expected to provide support for Your Contributions, except to the

extent You desire to provide support. You may provide support for free, for a

fee, or not at all. Unless required by applicable law or agreed to in

writing, You provide Your Contributions on an "AS IS" BASIS, WITHOUT

WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including,

without limitation, any warranties or conditions of TITLE, NON- INFRINGEMENT,

MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE.

7. Should You wish to submit work that is not Your original creation, You may

submit it to Twitter separately from any Contribution, identifying the

complete details of its source and of any license or other restriction

(including, but not limited to, related patents, trademarks, and license

agreements) of which you are personally aware, and conspicuously marking the

work as "Submitted on behalf of a third-party: [named here]".

8. You agree to notify Twitter of any facts or circumstances of which you become

aware that would make these representations inaccurate in any respect.