NEW YORK (

TheStreet

) --When isn't it an exciting year for the tech sector? From the launch of the iPad 2 to Netflix' graceless dive, here is a look back at the top stories by month for 2011.

January: Microsoft announces Windows 8 will run on ARM chips

When

Microsoft

(MSFT) - Get Report

gave a technical look at Windows 8 on January 5 at the Consumer Electronics Show, it was a stark contrast from previous versions of the operating system. In addition to bringing an app store to Windows, it would no longer run exclusively on chips using -x86 architecture from designers such as

Intel

(INTC) - Get Report

and

Advanced Micro Devices

(AMD) - Get Report

.

It would now be compatible with ARM-based chips.

Due late next year, Windows 8 is Microsoft's first operating system modeled for mobile devices, and Microsoft switching to ARM-based chips brought about the beginning of the end of the "Wintel" -- Windows + Intel -- monopoly.

Chips that use -x86 architecture are traditionally seen as more power consuming than chips which run on ARM designs, especially Intel's designs. ARM chips already have a stronghold in smartphones and tablets, with 10 % of the market in mobile devices, according to a May report from

Bloomberg

.

Microsoft bringing ARM-based chips to Windows will allow other chip companies such as

Qualcomm

(QCOM) - Get Report

,

Texas Instruments

(TXN) - Get Report

, and others which use intellectual property from

ARM Holdings

(ARMH)

to enter the personal computer market, where they have been shut out previously.

February: Verizon starts selling the iPhone

When

Apple

(AAPL) - Get Report

launched the iPhone in 2007,

AT&T

(T) - Get Report

was the exclusive carrier in the U.S., leaving

Verizon

(VZ) - Get Report

and

Sprint Nextel

(S) - Get Report

out in the cold.

Since then, constant speculation swirled about when Apple would bring the phone to Verizon, America's No. 1 cell phone carrier. The announcement finally

came in January,

as Apple's then-COO Tim Cook and Verizon's Lowell McAdam dropped the news at a glitzy New York City event. The phone went on sale at Verizon Feb. 10.

Sprint eventually got the phone later in the year.

March: iPad 2 launch; AT&T bids for T-Mobile

The iPad was a runaway hit in 2010, as Apple's tablet outsold every other tablet in the market by a wide margin; Apple sold close to

1 million iPads during the debut

weekend.

The iPad 2, which starts at $499 for the WiFi version, started shipping domestically March 11, and March 25, internationally.

The launch also marked Steve Jobs' last public appearance as a member of the company he co-founded more than 30 years ago.

Also in March, AT&T announced a $39 billion merger to buy

T-Mobile USA

, from its parent

Deutsche Telekom

. Throughout the year, this deal would be subject to lots of scrutiny from the federal government, consumers, and other carriers.

April: BlackBerry PlayBook launched

Desperate to compete with the likes of Apple and

Google

(GOOG) - Get Report

,

Research In Motion

(RIMM)

unveiled its own tablet, the PlayBook, which went on sale April 19.

The PlayBook went off to little fanfare, as it did not have the capability to send e-mail. It was RIM's first product with its newly-acquired QNX operating system, which was supposed to enable RIM to better compete with the mobile device market leaders.

Despite releasing several updates to the initial PlayBook software, consumers still complained about the price point, lack of apps, and the aforementioned inability to send email.

Since the April launch, RIM has cut the product price to $199 and

took a $485 million inventory charge

during the fourth quarter due to the lack of PlayBook sales.

May: Microsoft buys Skype, LinkedIn goes public

Microsoft transformed its social networking landscape when it

announced its intentions to buy Skype

for $8.5 billion in cash on May 10.

Skype gave Microsoft the much needed social networking presence it sorely lacked. It has been a way for Microsoft to add more functionality and usefulness to existing platforms, such as Xbox, Kinect, and Windows phones.

The purchase of Skype allowed Microsoft to continue making the Xbox into an entertainment hub, rather than just a gaming console.

Microsoft purchased the Luxembourg-based company from a group including Silver Lake, Index Ventures, Andreessen Horowitz and the Canada Pension Plan (CPP) Investment Board, and the deal

closed in mid October

.

LinkedIn

(LNKD)

was the first major social networking site to go public, paving the way for other social-minded Internet firms to go public later in the year. LinkedIn priced at $45 per share, opened at $83, and shot as high as $122.70 in July, before coming back down. Shares currently trade around $60, still above their IPO price.

June: Pandora IPO

Riding the wave of investor enthusiasm surrounding Internet firms established by LinkedIn's IPO,

Pandora

(P)

went

public on June 15

, surging as high as $26 during the initial trading session.

The stock has not seen that level since then.

Pandora, a free Internet music-streaming service, generates a significant portion of its revenues from display and audio ads, but users can also buy a subscription to the service, which costs $36 per year.

Pandora currently trades around $10 per share, well below the IPO price of $16, and below its all time high of $26.

July: Netflix announces price hikes

Netflix

(NFLX) - Get Report

was the darling of Wall Street, boasting stock-boosting factors like big subscriber growth. But on July 12, all of that changed. The company announced it would raise its subscription rates 60%, and would separate the DVD and online streaming businesses into two different Web sites, Netflix, and Qwikster, respectively.

Customers balked. CEO Reed Hastings backed off the plans to separate the businesses, but his credibility took a hit with both consumers and Wall Street.

Since hitting a high of around $300 per share back in July, shares have lost around 75% of their value. Year-to-date, the stock is down about 60%.

August: Google announces Motorola Mobility acquisition

As the battle for mobile device patents heated up, Google made its biggest acquisition ever, announcing on Aug. 15 its

intention to buy

cell phone stalwart

Motorola Mobility

(MMI) - Get Report

for $12.5 billion, a hefty 63% premium to Motorola's closing price the day before.

Google cut the deal to beef up its patent portfolio -- Motorola holds some 17,000 patents related mostly to the wireless industry, which should give Android protection against rivals like Apple.

Patents became a major issue throughout the year, as smartphone companies continued to sue each other over patent infringement. Many analysts saw Google's Motorola buy as a reaction to Google's failed bid to purchase Nortel's patents, which went to a consortium of others, including Apple, Research In Motion and Microsoft for $4.5 billion.

September: HP names Meg Whitman new CEO

Following a disastrous 11 months with Leo Apotheker at the helm,

HP

(HP) - Get Report

decided to

replace him

, naming Meg Whitman as his replacement on Sept. 22.

Whitman had previous experience running a Silicon Valley tech titan, as she was the CEO of

eBay

(EBAY) - Get Report

from 1998-2007.

Since

taking over

, Whitman has reportedly done a better job of communicating to investors than her predecessor and announced her intention to keep HP's PC business, which the company had previously said was looking to spin off or sell.

In December, Whitman reversed another decision made before she got there: She announced that HP would make its

Palm webOS

open source software.

October: iPhone 4S launch, Steve Jobs passes away

October was a very busy month for Apple. Not only did the company

launch its new iPhone 4S

, it saw the

passing of its legendary CEO, Steve Jobs.

Initial reaction to the iPhone 4S was weak, with many tech pundits noting that the phone was not much different than its predecessor, the iPhone 4. Sales of the iPhone 4S have still been brisk, with Apple

announcing it had sold over 4 million of the phones

in the first weekend it was available.

The death of Steve Jobs provoked a wave of emotion that circled the globe. Even the White House put out a response the day Jobs died, noting "there may be no greater tribute to Steve's success than the fact that much of the world learned of his passing on a device he invented."

Apple set up a

page

on its Web site to allow those around the world to express their emotions, both joyous and sadness, over the loss of Jobs.

November: Amazon Kindle Fire is launched

In November, Amazon went beyond its e-reader roots and announced the Kindle Fire, which many tech enthusiasts assumed would be the first viable competitor to the market-leading iPad. And by pricing it at $199, Amazon hoped to capture the low end of the tablet market, with Apple's iPad 2 starting at $499.

Its debut has been marred by

some complaints

, although Amazon contends that the device is selling extremely well.

Earlier in December, Dave Limp, Vice President, Amazon Kindle, said "Kindle Fire is the most successful product we've ever launched -- it's the best-selling product across all of Amazon for 11 straight weeks, we've already sold millions of units, and we're building millions more to meet the high demand."

He did not give specific sales figures, but did go on to say that Kindle Fire sales had "increased week over week for each of the past three weeks," as of December 15.

December: AT&T gives up T-Mobile

After months of regulatory issues including a lawsuit from the Department of Justice, AT&T

decided to end its bid for T-Mobile

on December 19.

AT&T will still

"invest aggressively"

in its network, but it will have to do so without the addition of the nation's fourth-largest mobile carrier.

Analysts have speculated AT&T will eventually need to acquire additional spectrum, with

Dish Network

(DISH) - Get Report

being

mentioned

as a possible target.

--

Written by Chris Ciaccia in New York

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