Personal Knowledge Management (PKM) is a set of processes, individually constructed, to help each of us make sense of our world and work more effectively. PKM is a framework that leads other employees while keeping in touch with them as well. Harold Jarche speaks on PKM in details. This is a video on PKM which I find it useful and easy to understand.
Personal Learning Network (PLN) is an online collection of people whom are socially connected to one another. Klingen (2009) mentioned that PLN is a social network sites like Facebook, Twitter, blogs and many more. My favorite social network site would be Facebook. I could connect and be in touch with my friends from all over the world, even my primary school mates whom I lost contact years ago. Through Facebook, mutual friends are link to one another and somehow I could locate my friends and stay connected with them.
Klingen, K. (2009, May 5). Pln: Your personal learning network made easy. Retrieved from http://onceateacher.wordpress.com/2009/05/05/pln-your-personal-learning-network-made-easy/