CDC?

CDC? is a children's puzzle book written and illustrated by author and cartoonist William Steig. Originally published in 1984, it is a sequel to CDB!, and is of the same concept: letters and numbers which suggest the sounds of words or phrases are printed as captions for interpretive cartoons. The reader guesses what the letters and numbers are supposed to represent in actual words. The book is somewhat more sophisticated in content than CDB!, using more complicated phrases. The book, in its 1984 release, was originally printed in black-and-white, and was republished and re-released with pen-and-ink watercolor style pictures and an answer-key at the end. To figure out the word puzzles, the reader needs to read the letters, numbers, and symbols aloud, pronouncing their names, not sounding them out. The picture accompanying each puzzle helps give the reader hints to the coded phrase.

Title translation

The books title, CDC?, translates: as "See (CEE, pronunciation of the letter c's name) the (DEE, pronunciation of the letter d's name, which sounds close to DUH, casual pronunciation of "the") Sea (CEE)?"

CDC

CDC may refer to:

Organizations

Government

Politics

Non-profit

CDC 1604

The CDC 1604 was a 48-bit computer designed and manufactured by Seymour Cray and his team at the Control Data Corporation (CDC). The 1604 is known as one of the first commercially successful transistorized computers. (The IBM 7090 was delivered in November 1959.) Legend has it that the 1604 designation was chosen by adding CDC's first street address (501 Park Avenue) to Cray's former project, the ERA-Univac 1103. A cut-down 24-bit version, designated the CDC 924, was also produced.

The first 1604 was delivered to the US Navy in 1960 for applications supporting major Fleet Operations Control Centers in Hawaii, London, and Norfolk, Virginia. By 1964, over 50 systems were built. The CDC 3000 succeeded the 1604.

A 12-bit minicomputer, called the CDC 160, was often used as an I/O processor in 1604 systems. A stand-alone version of the 160 called the CDC-160A was arguably the first minicomputer.

Architecture

Memory in the CDC 1604 consisted of 32K 48-bit words of magnetic core memory with a cycle time of 6.4 microseconds. It was organized as two banks of 16K words each, with odd addresses in one bank and even addresses in the other. The two banks were phased 3.2 microseconds apart, so average effective memory access time was 4.8 microseconds. The computer executed about 100,000 operations per second.