ADD: more bibliography

os.bib

@@ -98,3 +98,10 @@ month={Aug},}
  keywords={field programmable gate arrays;logic design;synchronisation;C/C++;FPGA accelerated applications;FPGA accelerators;FPGA cores;Java;Linux operating system;PCIe link configurations;Python bindings;RIFFA 2.0;Windows operating system;Xilinx FPGA;acceleration platform;commodity CPU;data transfers;open source;reusable integration framework;synchronization;system bus;Acceleration;Clocks;Field programmable gate arrays;Hardware;Protocols;Software;Workstations},
  doi={10.1109/FPL.2013.6645504},
  month={Sept},}
+
+ @book{ieee1990information,
+  title     = {Information Technology-Portable Operating System Interface},
+  author    = {IEEE, Inc. Staff, CORPORATE},
+  year      = {1990},
+  publisher = {IEEE Standards Office}
+}