Common use of OPERATING SEGMENT Clause in Contracts

OPERATING SEGMENT. The Company operates its main business in reportable operating segments according to the type of products and services provided with the main geographical area in Thailand as follows: - Sales including installment segment (main segment) Computer network systems, fully integrated of communication system, wireless communication system, network security system, data centre solution and management system and network system management including to provide maintenance services related to such systems - Other segments System development installation including related services and other services The operating segment’s performance is regularly reviewed by the chief operating decision maker who is the Executive Directors in order to make decisions about the allocation of resources to the segment and assess its performance. The Company assesses the performance of the operating segment by using the operating profit or loss as the basis consistent with that used to assess operating profit or loss in the financial statements. Details of financial information classified by operating segments for the years ended December 31, 2020 and 2019 were as follows: Consolidated statement of comprehensive income (partial) For the year ended December 31, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 Cost of sales and services (411.72) (346.85) (97.58) (85.36) (8.14) (9.14) (517.44) (441.35) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 Interest income 3.00 1.99 Other income 1.55 0.73 Selling expense (35.27) (34.26) Administration expense (115.48) (104.10) Other expense - (0.44) Finance cost (1.01) (0.48) Income tax expense (14.87) (12.71) Profit for the period 53.87 48.92 Separate statement of comprehensive income (partial) For the year ended December 31, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 Cost of sales and services (411.72) (346.85) (97.58) (85.36) (8.14) (9.14) (517.44) (441.35) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 Interest income 3.00 1.99 Other income 1.55 0.73 Selling expense (35.27) (34.26) Administration expense (115.39) (104.10) Other expense - (0.44) Finance cost (1.01) (0.48) Income tax expense (14.87) (12.71) Profit for the period 53.96 48.92 The Company operates its business in a single geographic region in Thailand only. As a result, all of revenues and assets as reflected in these financial statements pertain exclusively to this geographical reportable segment. For the year ended December 31, 2020 and 2019, the Company had no revenues from sales and services from any customers with the amount over 10% of the total revenue.

OPERATING SEGMENT. The Company Group operates its main business in reportable operating segments according to the type of products and services provided with the main geographical area in Thailand as follows: - Sales including installment segment (main segment) Computer network systems, fully integrated of communication system, wireless communication system, network security system, data centre solution and management system and network system management including to provide maintenance services related to such systems - Maintenance services segment Management system and network system management including to provide maintenance services related to such Computer network systems - Construction Telecommunications engineering - Other segments System development installation including related services and other services The operating segment’s performance perform ance is regularly reviewed by the chief operating decision maker who is the Executive Directors in order to make decisions about the allocation of resources to the segment and assess its performance. The Company Group assesses the performance of the operating segment by using the operating profit or loss as the basis consistent with that used to assess operating profit or loss in the financial statements. Consolidated statement of comprehensive income (partial) For the three-month period ended June 30 Sales including instalment Maintenance services Construction Others Total 0000 0000 0000 2022 2023 2022 2023 2022 2023 2022 Revenues from sales and services 185.76 117.15 75.73 51.34 19.32 7.28 2.17 3.13 282.98 178.90 Cost of sales and services (140.71) (87.87) (47.82) (29.35) (16.71) (5.52) (1.19) (1.73) (206.43) (124.47) Gross profit 45.05 29.28 27.91 21.99 2.61 1.76 0.98 1.40 76.55 54.43 Interest income 1.98 1.44 Other income 1.53 1.56 Selling expense (11.81) (9.37) Administration expense (38.41) (32.27) Finance cost (0.44) (0.26) Income tax expense (5.28) (3.45) Profit for the period 24.12 12.08 Depreciation and amortization 4.04 3.62 Details of financial information classified by operating segments for the years three-month and six-month periods ended December 31June 30, 2020 2023 and 2019 2022 were as follows: Consolidated statement of comprehensive income (partial) For the year six-month period ended December 31, June 30 Sales including instalment Maintenance services Construction Others Total 2020 2019 2020 2019 2020 2019 2020 2019 0000 0000 0000 2022 2023 2022 2023 2022 2023 2022 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 278.39 261.94 144.71 101.24 52.02 7.33 4.98 8.64 480.10 379.15 Cost of sales and services (411.72209.30) (346.85197.08) (97.5889.98) (85.3657.98) (8.1445.75) (9.145.93) (517.442.65) (441.355.25) (347.68) (266.24) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 69.09 64.86 54.73 43.26 6.27 1.40 2.33 3.39 132.42 112.91 Interest income 3.00 1.99 3.87 2.82 Other income 1.55 0.73 2.40 2.56 Selling expense (35.2721.34) (34.2619.36) Administration expense (115.4872.43) (104.10) Other expense - (0.4466.41) Finance cost (1.011.03) (0.480.36) Income tax expense (14.878.05) (12.717.21) Profit for the period 53.87 48.92 Separate statement of comprehensive income (partial) For the year ended December 31, Sales including instalment Maintenance services Others 35.84 24.95 Depreciation and amortization 8.02 6.78 Assets Fixed assets 134.01 140.92 Other assets 765.79 600.76 Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 Cost of sales and services (411.72) (346.85) (97.58) (85.36) (8.14) (9.14) (517.44) (441.35) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 Interest income 3.00 1.99 Other income 1.55 0.73 Selling expense (35.27) (34.26) Administration expense (115.39) (104.10) Other expense - (0.44) Finance cost (1.01) (0.48) Income tax expense (14.87) (12.71) Profit for the period 53.96 48.92 899.80 741.68 The Company Group operates its business in a single geographic region in Thailand only. As a result, all of revenues and assets as reflected in these financial statements pertain exclusively to this geographical reportable segment. For the year ended December 31, 2020 and 20192023, the Company had no revenues group has sales revenue from selling with installation from a major private company customer in the amount of Baht 64.57 million from sales with installation segment and services from any customers with the amount over 10% of the total revenueMaintenance service segment.

OPERATING SEGMENT. The Company Group operates its main business in reportable operating segments according to the type of products and services provided with the main geographical area in Thailand as follows: - Sales including installment segment (main segment) Computer network systems, fully integrated of communication system, wireless communication system, network security system, data centre solution and management system and network system management including to provide maintenance services related to such systems - Other segments System development installation including related services and other services The operating segment’s performance is regularly reviewed by the chief operating decision maker who is the Executive Directors in order to make decisions about the allocation of resources to the segment and assess its performance. The Company Group assesses the performance of the operating segment by using the operating profit or loss as the basis consistent with that used to assess operating profit or loss in the financial statements. Details of financial information classified by operating segments for the years three-month and nine- month periods ended December 31September 30, 2020 and 2019 were as follows: Consolidated statement of comprehensive income (partial) For the year three-month period ended December 31September 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 134.54 99.39 42.15 39.00 2.66 2.06 179.35 140.45 Cost of sales and services (411.72101.35) (346.8570.34) (97.5824.39) (85.3617.90) (8.141.41) (9.140.67) (517.44127.15) (441.3588.91) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 33.19 29.05 17.76 21.10 1.25 1.39 52.20 51.54 Interest income 3.00 1.99 0.81 0.47 Other income 1.55 0.73 - 0.08 Selling expense (35.2710.54) (34.266.10) Administration expense (115.4828.69) (104.1026.26) Other expense - (0.440.08) (0.10) Finance cost (1.010.18) (0.480.09) Income tax expense (14.872.69) (12.713.97) Profit for the period 53.87 48.92 10.83 15.57 Separate statement of comprehensive income statement (partial) For the year three-month period ended December 31September 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 134.54 99.39 42.15 39.00 2.66 2.06 179.35 140.45 Cost of sales and services (411.72101.35) (346.8570.34) (97.5824.39) (85.3617.90) (8.141.41) (9.140.67) (517.44127.15) (441.3588.91) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 33.19 29.05 17.76 21.10 1.25 1.39 52.20 51.54 Interest income 3.00 1.99 0.81 0.47 Other income 1.55 0.73 - 0.08 Selling expense (35.2710.54) (34.266.10) Administration expense (115.3928.66) (104.1026.26) Other expense (0.08) (0.10) Finance cost (0.18) (0.09) Income tax expense (2.69) (3.97) Profit for the period 10.86 15.57 Consolidated statement of comprehensive income (partial) For the nine-month period ended September 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 383.12 337.23 126.05 119.35 11.21 5.18 520.38 461.76 Cost of sales and services (283.82) (242.80) (72.39) (66.78) (7.11) (2.07) (363.32) (311.65) Gross profit 99.30 94.43 53.66 52.57 4.10 3.11 157.06 150.11 Interest income 2.20 1.50 Other income 0.55 0.50 Selling expense (28.01) (27.69) Administration expense (83.44) (76.32) Other expense - (0.440.26) Finance cost (1.010.90) (0.480.27) Income tax expense (14.879.39) (12.719.85) Profit for the period 53.96 48.92 38.07 37.72 Separate comprehensive income statement (partial) For the nine-month period ended September 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 383.12 337.23 126.05 119.35 11.21 5.18 520.38 461.76 Cost of sales and services (283.82) (242.80) (72.39) (66.78) (7.11) (2.07) (363.32) (311.65) Gross profit 99.30 94.43 53.66 52.57 4.10 3.11 157.06 150.11 Interest income 2.20 1.50 Other income 0.55 0.50 Selling expense (28.01) (27.69) Administration expense (83.41) (76.32) Other expense - (0.26) Finance cost (0.90) (0.27) Income tax expense (9.39) (9.85) Profit for the period 38.10 37.72 The Company Group operates its business in a single geographic region in Thailand only. As a result, all of revenues and assets as reflected in these financial statements pertain exclusively to this geographical reportable segment. For the year ended December 31, 2020 and 2019, the Company had no revenues from sales and services from any customers with the amount over 10% of the total revenue.

OPERATING SEGMENT. The Company operates its main business in reportable operating segments according to the type of products and services provided with the main geographical area in Thailand as follows: - Sales including installment segment (main segment) Computer network systems, fully integrated of communication system, wireless communication system, network security system, data centre solution and management system and network system management including to provide maintenance services related to such systems - Other segments System development installation including related services and other services The operating segment’s performance is regularly reviewed by the chief operating decision maker who is the Executive Directors in order to make decisions about the allocation of resources to the segment and assess its performance. The Company assesses the performance of the operating segment by using the operating profit or loss as the basis consistent with that used to assess operating profit or loss in the financial statements. Details of financial information classified by operating segments for the years ended December 31, 2021 and 2020 and 2019 were as follows: Consolidated statement of comprehensive income (partial) For the year ended December 31, Sales including instalment Maintenance services Others Total 0000 0000 0000 2020 2019 2021 2020 2019 2021 2020 2019 2020 2019 Revenues from sales and services 374.98 544.07 461.15 186.30 171.79 160.25 21.84 17.53 18.14 583.12 733.39 639.54 Cost of sales and services (280.61) (411.72) (346.85105.15) (97.58) (85.3615.75) (8.14) (9.14401.51) (517.44) (441.35) Gross profit 94.37 132.35 114.30 81.15 74.21 74.89 6.09 9.39 9.00 181.61 215.95 198.19 Interest income 3.57 3.00 1.99 Other income 2.56 1.55 0.73 Selling expense (35.2728.09) (34.2635.27) Administration expense (115.48114.24) (104.10) Other expense - (0.44115.48) Finance cost (1.010.45) (0.481.01) Income tax expense (14.878.02) (12.7114.87) Profit for the period 36.94 53.87 48.92 Separate statement of comprehensive income (partial) For the year ended December 31, Sales including instalment Maintenance services Others Depreciation and amortization 12.15 10.16 Assets Fixed assets 142.89 146.23 Other assets 631.32 469.39 Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 Cost of sales and services (411.72) (346.85) (97.58) (85.36) (8.14) (9.14) (517.44) (441.35) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 Interest income 3.00 1.99 Other income 1.55 0.73 Selling expense (35.27) (34.26) Administration expense (115.39) (104.10) Other expense - (0.44) Finance cost (1.01) (0.48) Income tax expense (14.87) (12.71) Profit for the period 53.96 48.92 774.21 615.62 The Company operates its business in a single geographic region in Thailand only. As a result, all of revenues and assets as reflected in these financial statements pertain exclusively to this geographical reportable segment. For the year ended December 31, 2020 and 2019, the Company had no revenues from sales and services from any customers with the amount over 10% of the total revenue.

OPERATING SEGMENT. The Company operates its main business in reportable operating segments according to the type of products and services provided with the main geographical area in Thailand as follows: - Sales including installment segment (main segment) Computer network systems, fully integrated of communication system, wireless communication system, network security system, data centre solution and management system and network system management including to provide maintenance services related to such systems - Other segments System development installation including related services and other services The operating segment’s performance is regularly reviewed by the chief operating decision maker who is the Executive Directors in order to make decisions about the allocation of resources to the segment and assess its performance. The Company assesses the performance of the operating segment by using the operating profit or loss as the basis consistent with that used to assess operating profit or loss in the financial statements. Details of financial information classified by operating segments for the years three-month and six- month periods ended December 31June 30, 2020 and 2019 were as follows: Consolidated statement of comprehensive income (partial) For the year three-month period ended December 31June 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 138.14 138.31 41.58 38.74 3.25 1.42 182.97 178.47 Cost of sales and services (411.7299.46) (346.85101.55) (97.5824.93) (85.3623.31) (8.142.14) (9.140.78) (517.44126.53) (441.35125.64) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 38.68 36.76 16.65 15.43 1.11 0.64 56.44 52.83 Interest income 3.00 1.99 0.81 0.77 Other income 1.55 0.73 0.57 0.44 Selling expense (35.2710.11) (34.2611.80) Administration expense (115.4828.15) (104.1025.36) Other expense - (0.440.07) Finance cost (1.010.20) (0.480.11) Income tax expense (14.873.78) (12.713.47) Profit for the period 53.87 48.92 Separate statement of comprehensive income (partial) 15.58 13.23 For the year six-month period ended December 31June 30, Sales including instalment Maintenance services Others Total 2020 2019 2020 2019 2020 2019 2020 2019 Revenues from sales and services 544.07 461.15 171.79 160.25 17.53 18.14 733.39 639.54 248.58 237.84 83.90 80.35 8.54 3.12 341.02 321.31 Cost of sales and services (411.72182.47) (346.85172.46) (97.5848.00) (85.3648.88) (8.145.70) (9.141.40) (517.44236.17) (441.35222.74) Gross profit 132.35 114.30 74.21 74.89 9.39 9.00 215.95 198.19 66.11 65.38 35.90 31.47 2.84 1.72 104.85 98.57 Interest income 3.00 1.99 1.39 1.00 Other income 1.55 0.73 0.63 0.45 Selling expense (35.2717.47) (34.2621.59) Administration expense (115.3954.74) (104.1049.65) Other expense - (0.440.16) Finance cost (1.010.72) (0.480.59) Income tax expense (14.876.70) (12.715.88) Profit for the period 53.96 48.92 27.24 22.15 The Company operates its business in a single geographic region in Thailand only. As a result, all of revenues and assets as reflected in these financial statements pertain exclusively to this geographical reportable segment. For the year ended December 31, 2020 and 2019, the Company had no revenues from sales and services from any customers with the amount over 10% of the total revenue.