There are two types of body waves: compressional (P) waves and shear (S) waves. Primary waves (P-waves) travel the fastest, so they arrive at the recording station (seismograph) first. Secondary or shear waves (S-waves) travel slower than P-waves so they arrive second.
Modified frequency modulation (MFM) is an encoding scheme used by PC floppy disk drives and older hard drives.
Micromem) (OTCBB:MMTIF) a Toronto-based developer of magnetic random access memory (MRAM), today announced that it has retained the services of Strategic Solutions, a California-based engineering firm specializing in lab-to-fab transitions, to continue Micromem's pursuit of commercializing its. MRAM technology.