Abstract  Due to the development witnessed in the field mobil e phone and the development of their operating syst ems added to  the increase in number of users and many businesses  that have relied on them, a large number of programmers have started to  develop special operating systems for these phones  and building applications that meet the demands of  the users and facilitate  a great number of businesses. The proposed work is  designing a mini-operating system for managing some  special features of  the  mobile  phone.  The  operating  system  designed  in  this  work  is  based  on  multitasking  –multithreading with  mixing  of  preemptive  and  cooperative mode.  The  functions  and  features  chose  where  those  related  to  message  manag ement  for  sending  and receiving SMS. Photo-album application also is  chooses for managing and displaying images with dif ferent formats stored  in mobile memory, and contact application for displ aying names and phone numbers. This system can be c onsidered a starting  point to establish an integrated operating system f or mobile phones. As the internal memory for the mo bile phone is small, low  output  size  language  J2ME  has  been  used  for  program ming  this  operating  system.  J2ME  relays  on  virtual machines  which  is  an  implementation  of  KVM  in  its  operating.  This  lan guage  is  characterized  by  its  multiple  channels  and  it  is  considered  appropriate for all low memory sets.   

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[18] Silberschatz A., Galvin P., and Gagne G., Operating System Concepts (7 th edition), Mc-Grawhill , 2005. Dhuha Albazaz is an assistant professor at Computers Sciences Department, College of Computers and Mathematics, University of Mosul. She received her PhD degree in computer sciences in 2004 in the speciality of computer architecture and operating system. She supervised many Master degree students in operating system, computer architecture, dataflow machines, mobile computing, real time, and distributed databases. Sh e has three PhD students in FPGA field, distributed r eal time systems, and Linux clustering. She also leads and teaches modules at both BSc, MSc, and PhD levels in computer science. Also, she teaches many subjects f or PhD and master students.