manufactured (overall production method/technique)
plastic (overall material)
metal (overall material)
overall: 9 in x 29 in x 24 in; 22.86 cm x 73.66 cm x 60.96 cm
United States: Texas, Fort Worth
In the early 1970s, most personal computers came as hobbyist kits requiring a high level of technical expertise to assemble. Don French, a buyer for the consumer electronics chain Tandy Radio Shack (TRS), believed that Radio Shack should offer an assembled personal computer and hired engineer Steve Leininger to design it. In the summer of 1977, Radio Shack introduced the TRS-80 for $599. This offering included a BASIC language interpreter, four kilobytes of RAM, a Zilog Z80 processor at 1.77 megahertz, a twelve-inch video monitor, a cassette recorder, a power supply, and a cassette tape containing the games Blackjack and Backgammon. While some Tandy executives were skeptical about the success of the PC market, the availability of the TRS-80 on five thousand Radio Shack store shelves helped the Model 1 sell over one hundred thousand units during its first year, which was 50 percent of the total PCs sold in 1978.
The TRS-80 had its microprocessor inside its keyboard. While you could purchase just the TRS-80 for $400, most opted for the package that included the twelve-inch monitor and cassette recorder for $600. This object includes the TRS-80 Expansion Interface for $299 (below monitor) that gave the machine an extra thirty-two kilobytes of memory; the TRS-80 Telephone Interface II for $199 (far left) that allowed for network communication; two Mini-Disk drives for $499 (right of monitor); and printer for $399 (far right).
Green i/O unit of irregular rectangular shape with black keypad and retractable antenna; stylus and earphone in recesses in body. Irregular square green base with attached black plug; slot for i/O unit.
Reginald Marsh art notebook #4, models and expenses
Marsh, Reginald, 1898-1954
1 notes 22 x 16 cm.
Notebook containing loose pages of dated lists of work expenditures, contact information for artists' models, and some sketches and correspondence. Two additional notecards and three torn notes inserted in volume. Only two pages are displayed here, including Marsh's list "Expenses in the pursuit of art." To view this item online in its entirety, see Series 4, Box 4, folders 13-14 of the Reginald Marsh papers.
Casio Personal-I Handheld Electronic Calculator - Model H-802
Casio Computer Company, Ltd.
plastic (case; display window; keys material)
metal (circuitry material)
paper (sticker material)
overall: 3/4 in x 3 in x 4 7/8 in; 1.905 cm x 7.62 cm x 12.3825 cm
This handheld electronic calculator has a plastic case that is black in front and cream-colored on the edges and back. The keyboard has an array of square plastic keys, including ten digit keys, a decimal point key, a total key, and four keys for arithmetic functions that are to the right of the digit keys. Across the top of the keyboard are AC (all clear), C (clear entry), square root, and percentage keys.
Behind the keyboard is an eight-digit display. Text behind this reads: CASIO personal-I (/) ELECTRONIC CALCULATOR. The on/off switch is at the top of the left side, and the socket for a power adapter is along the top edge at the left.
A battery compartment at the top of the back would hold two AA batteries. A sticker inside the compartment reads: 4409774. Text below the compartment reads: CASIO personal-I (/) BATTERY SUPPLY 1.5Vx2 (/) or use AC ADAPTOR AD-2S (/) 0.2W (/) H802 MADE IN JAPAN (/) BM CASIO COMPUTER CO. LTD.
Advertisements for the Casio Personal-I calculator appeared in the Chicago Tribune and the Los Angeles Times during 1976 and 1977. The calculator cost $9.95 initially, with sale prices as low as $8.90. Ball and Flamm also date the calculator to about 1976.
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 52.