If you’ve paid attention to Facebook’s culture at all, you know that one thing has stayed true since its launch. The company has a hacker mentality, and since 2007 has held many official “hackathons” which allow its entire company to collaborate on ideas that they don’t get to work on every day.

Today, the company shared a bit about the history of the hackathon, and it’s an interesting glimpse into the largest social network in the world.

In the early days, the company notes that hackathons happened on a nightly basis. Anyone that has started a tech company knows that sleep comes at a premium and the ones that iterate the fastest, and smartest, are the ones that win.

Here are some interesting insights from an engineering lead at Facebook, Pedram Keyani, including how happy CEO Mark Zuckerberg was with the first hackathon:

In Facebook’s early days, a lot of ordinary nights were like hackathons—when someone decided they wanted to stay up all night to build a prototype, they just did it. But as Facebook grew, people started organizing hackathons as a way to collaborate with colleagues from different parts of the team to get their ideas working fast. I had heard a lot about hackathons before I came to Facebook, and about a month after I joined in 2007, I asked another engineer when the next hackathon would be. He just said, “Whenever someone wants to organize it.” I immediately went to my desk and emailed the company that I was going to hack the following night and, if anyone else wanted to join me, I would get food and drinks. The following night, we had a great hackathon that generated lots of innovative projects and ideas. Zuck came to my desk the next day and told me how awesome the hackathon had been, and from then on I’ve been spreading the word.

In case you wondered what happened after a hackathon, Keyani shares that teams get together and decide which things should move forward and eventually ship:

After each hackathon, we keep the momentum going by holding a prototype forum where everyone who built a project can present it to the company. Prototype forum usually happens a week after the hackathon, so it gives people a chance to fine-tune their projects and prepare them for live demos. Everyone gets the same amount of time at the forum—two minutes—to convince their peers that their idea should ship.

On the eve of Facebook’s IPO, the entire company participated in a massive overnight hackathon, keeping its collective heads down and focused on making the product the best it could be. Products like “photos” came together during such hackathons, which is proof that when a company has a mentality to tinker and think outside of the box, great things can happen.

If you have a company of your own, or would like to join Facebook one day, I highly suggest that you give the post a full and thorough read yourself.

As we reported earlier, Scott Thompson has stepped down been ousted as CEO of Yahoo!. The reason was, as you may already be aware, a mixup flub of facts on his resume.

There have been six CEOs in the history of Yahoo! (plus a short interim-stint by Tim Morse that barely counted) and we thought that it would be appropriate to give you a quick reminder of those who came before current interim CEO Ross Levinsohn.

In 18 years as a company, having six CEOs isn’t the norm, and when you dig into some of the personalities that have held the position, you have to wonder what exactly is going on over there in purple land.

Here’s a quick summary of CEO highlights and lowlights. Ok, just the latter. Honestly, you couldn’t pay me enough to take this job.

March 1995 to March 7th, 2001 – Tim Koogle

Serving as the first CEO of Yahoo! is an impressive title to hold. Koogle came into the position with 20 years of business under his belt, having spent time at Motorola. While he served a nice chunk of time as the top dog, he went through his share of drama. Remember that time when he was sued by Holocaust survivors for “justifying the Holocaust by allowing the sale of Nazi memorabilia on Yahoo’s auction site”? Yikes.

April 17th, 2001 to June 18th 2007 – Terry Semel

Terry Semel took over from the only CEO that Yahoo! ever knew, and it was a changing of the guard that was very necessary in the eyes of the board and shareholders. He spent nearly 25 years at Warner Bros. and came in battle tested. Semel got to lead the company during some trying times, specifically surrounding personal data sharing with authorities in China. Remember when he took heat for sharing information with police that led to the arrest of a blogger? In retrospect, Semel said:

We continue to be pissed off and are sorry about it.

Ugh. Oh, and it’s also rumored that Semel completely flubbed a potential purchase of Google. Facebook too.

In 2007, Yahoo’s board told its shareholders that Semel was doing a wonderful job. One week later he was ousted.

June 18th, 2007 to November 17th, 2008 – Jerry Yang

When Jerry Yang was brought in, many thought that Yahoo! would be able to turn around its previous misfortunes. Since Yang was one of its co-founders, surely he could come in and right the ship. I mean, Yahoo’s original name was “Jerry and Dave’s Guide to the World Wide Web” so surely he had some more tricks up his sleeve, right? Wrong. Yahoo’s stock tanked under Yang and he turned down Microsoft’s acquisition offers multiple times.

Here’s what Yang said after Microsoft’s offer of over $44B:

The global online advertising market is projected to grow from $45 billion in 2007 to $75 billion in 2010. And we are moving quickly to take advantage of what we see as a unique window of time in the growth—and evolution—of this market.

Yeah, not “quickly” enough apparently.

When he stepped down as CEO, he kept his previous title of “Chief Yahoo!” (what a horrible title), but eventually left the company completely.

January 13th, 2009 to September 6th, 2011 – Carol Bartz

Oh, Carol Bartz. What can I say about her that you don’t already know? A polarizing figure, coming off of being the CEO of Autodesk, came in to “kick some butt”. If “kick some butt” meant “record number of layoffs”, then Bartz definitely kicked some butt.

Instead of selling the company to Microsoft, Bartz helped strike a search deal with Microsoft that helped to kickstart Bing. But let’s be serious, Bartz was interesting because she cursed like a drunken sailor.

Remember when she told Michael Arrington (then at TechCrunch) to “fuck off”? Just in case you didn’t, here’s the video:

Oh, and Bartz was fired over the phone. Here’s her “goodbye” email to Yahoo! employees, sent from her iPad:

To all,
I am very sad to tell you that I’ve just been fired over the phone by Yahoo’s Chairman of the Board. It has been my pleasure to work with all of you and I wish you only the best going forward.
Carol
Sent from my iPad

January 2012 to May 13th, 2012 – Scott Thompson

This was a hire that really led people to believe that Yahoo! meant business about turning around its previous misfortunes. Scott Thompson served as President at PayPal and ran its online payment division and came in with encouraging quotes like:

Clearly, speed is important but we will attack both the opportunity ahead and the competitive challenges with an appropriate balance of urgency and thoughtfulness. I cannot wait to get started.

Get started he did and get started he didn’t even get a chance to do. The only real work that Thompson got to partake in were the layoffs of roughly 14% of its workforce, or about 2,000 people. Here’s what Thompson had to say about them:

Change is never easy. But the time has come to move Yahoo! forward aggressively with increased focus and accountability. Our values have always been about treating all Yahoos with dignity and respect, and today is a day to embrace those values.

If you ask me, Yahoo! makes change look really easy.

After five months as CEO, his educational background came into question. You see, Thompson’s bio mentioned a computer science degree from Stone Hill College. Only problem is, when Thompson attended Stone Hill College there was no computer science degree offered. Oops.

May 13th 2012 to Present – Ross Levinsohn (Interim)

Immediately after giving Scott Thompson the boot, the company named Ross Levinsohn as interim CEO. Previously, Levinsohn held the “EVP of “Americas” at Yahoo!” post. Prior to that, he was President at Fox Interactive, the Internet arm of Rupert Murdoch’s News Corp.

His crowning achievement at Fox Interactive? Leading the charge to buy Myspace for over $500M.

Oh boy, this can’t turn out well.

When people ask me why I use foursquare so much, they’re usually surprised by my response. Even though I share my various check-ins and places that I visit, I use the service primarily to keep a log for myself. As soon as foursquare launched, I knew that I would be able to get something amazing out of it for years to come.

Today, foursquare launched a new “history” page which will let you search through all of your past check-ins. Here’s what the company had to say about it:

Want to remember all the places you went to on last summer’s trip to Mexico? Or relive all the adventures you’ve had with your best friend? With our all-new, fully-searchable history page, you can easily jump to all your past check-ins from any month or year, and even filter them by who you were with, what type of place you were at, or which neighborhood, city, or country you were in. We’ll show you your check-in photos, comments, and friends who were there.

Here’s a look at my history page:

The idea of being able to see where I was a few years ago, with a time and date stamp, is really cool to me. It’s the same idea behind Facebook’s Timeline which is promoted as being able to tell the story of your life.

By letting me access all of my data, foursquare has become an even more useful service. There are many times where I’m trying to remember the name of my favorite Mexican restaurant in San Francisco, but simply can’t come up with it. The filters on the history page not only let me find those places, but drill down based on who I was with and when:

Along with the “Explore” option, foursquare has once again solidified its position as the number one location based service out there.

You can see your history page by visiting: http://foursquare.com/history