Portable System Comparison

A timeline of portable systems

Sony PSP

12/12/2004 - Aug 30 2007
aug 30 2007 - oct 2008
oct 2008 - Present
oct 2009 - Present

Nintendo DS

11/21/2004 - 3/2/2006
3/2/2006 - Present
11/1/2008 - Present
11/21/2009 - Present

Apple iPhone

6/29/2007 - 7/11/2008
7/11/2008 - Present
7/19/2009 - Present

Nintendo GameBoy

April 21 1989 - September 3, 1996
September 3, 1996 - October 21, 1998
October 21, 1998 - March 21 2001
3/21/2001 - February 14, 2003
February 14, 2003 - 3/2/2006
9/13/2005 - 3/2/2006

Other Systems

September 1989 - 1994
1990 - 1993
12/6/1990 - 1997
October 13, 1995 - 1997
September 1997 - September 1999
1998 - 2000
October 2003 - October 2005
October 7, 2003 - May 2004
May 2004 - May 2006
March 2005 - February 2006
September 15, 2009 - Present