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What was the first commercial calculator?
In 1957, IBM released the first commercial all-transistor calculator named IBM 608.
Who was Bernard Dimsdale?
Bernard Dimsdale is an American inventor and lives in Santa Monica, CA. He works for the IBM Corporation in the United States.Ê
What is the relationship of qdos to cp m and ms dos?
CP/M came out first for the 8080 and was offered to Intel, they rejected it as not necessary. The author Gary Killdell sold it himself and developed versions for other microprocessors. When IBM decided to do the PC they chose CP/M-86 as the operating system. But for unclear reasons Gary would not sign their NDA. IBM could not proceed, but Microsoft had already signed an NDA to provide their BASIC for the PC. IBM turned to them, however Microsoft had no operating system of their own to offer. They found and bought out the developer of QDOS (quick and dirty OS) a CP/M-86 clone. With minor modifications it became the first version of both MSDOS and PCDOS.
What does PDMQ mean?
One meaning is the Latin term "Parva Domus Magna Quies." It means "the quietness of a small house." It is also a file name associated with administering access control in IBM computers.
Who invented hexadecimal and when?
The first use of the term hexadecimal dates to 1954. It is unclear who invented the current hexadecimal notation - most likely IBM. Not all computers used hexadecimal until the end of the 70s or later. Hewlett-Packard continued to use octal instead of hexadecimal until after 1980.
